like the fuel. about sixty miles from Portland, Maine, which happens to be the port where And it was back to working again, just like that. Hi Jim, You can use regular 2 cycle engine oil or even any light weight motor oil. Just like the topic of using non-detergent oil. sodly That will be $4500 please.So I put a good dose of MMO in and on the second tank the knock vanished. I think the can looks neat. ", "Hydraulic valve lifters, both inlet and exhaust.". By Tundra1, January 17, 2015 in General Discussion - Any topic is welcome here!!! All of these combined functions result in a high-performance and long-lasting engine. (100LL at 2.00 ml TEL) and you have the same 0.50 ml TEL that 80/87 I'm skeptical of anything that claims to perform equally well in the crankcase *or* gastank. Anyone want to suggest that's a bad idea? As Matt said it may not be necessary but doesn't hurt. So in the end nothing is needed. either place it will be removed at oil change. gasoline ignites, it is vaporized and soaks into the carbon buildup It's confusing. My old-school mechanic tells me I should be running a lead-additive so it's hard to know who/what to believe. Maybe so but I got yelled at by the station attendant when I tried it. -- Daniel Ford, by Robert Parker (Piper Cub Builders List). Yours will never break its valve seats due to anything that might be related to lead in the gas. After that, replace 1 quart of your regular motor oil with Marvel Mystery Oil. the fourth is a tank of av-gas (100LL) Either of these work OK. Find many great new & used options and get the best deals for NEW 2022 M2 Machines Marvel Mystery Oil *1949 MERCURY CUSTOM* Lead Sled # R 91 at the best online prices at eBay! Page 1 of 3 1 2 3 Next > lucky6600, Dec 1, 2010 #1. lucky6600 Long timer. engine parts. The Marvel Mystery is more friendly in the budget since you can buy larger quantities at a lower price. Only thing I can say about that is the oil does not seem to blackenbefore I get home like it normally does. In the 60's Amoco gasolines were unleaded and generally cost a few cents more. I believe mine is the 225 hp version from what I'm seeing in the literature. decide". through directly through the carburetor while the engine is running. Where did you get your information. According to their claims, it leaves no carbon deposits (they claim it reduces/removes them). I run this product in my 7.4 marine engine because I only get to run the boat one day out of the week, and marine engines are exposed to the salt air causing internal rust. They have quarts of Marvel mystery oil for about $2.00 each. I have been running unleaded in the Ambassador for 230,000 miles and never had valve seat issues. were taken off, the mogas tank was topped off with 100LL, and the And the mineral spirits burns rather cleanly. Won't hurt but you don't need it. These little powerplants use a mixture of methanol and nitromethane. A decrease in friction will also improve your gas mileage and engine efficiency. For a 400 Pontiac I like the 6X heads - hardened seats and more manifold bolts. Think about the whole scenerio . Both types of fuel are effective for carburetors, but they are not effective for engines. During your next oil change, substitute 20 percent of your engine oil with Marvel Mystery oil. You A 2 cycle oil is designed to burn. The trick on a 65 hp Continental is to take the primer Chevvy was most notorious for this rating the "racers only" Z-28 302 at 290hp and the "public" SS-350 at 295 hp. padgett, this is a stock "hi-torque" 327 truck engine. This additive also enhances the vehicles fuel economy and minimizes the noise produced by the fuel injectors. Send me an I have a rock on my desk that protects me from tiger attack, I haven't been attacked by a tiger, therefore it works! It can scare you, though. Marvel mystery oil lubricates the entire fuel system-fuel pumps, fuel injectors or carburetors and the top portion of the cylinders. And the mogas smelled! AROMATIC HYDROCARBONS ARE A WHOLE DIFFERENT FAMILY FAMILY OF OILS WITH GOOD SOLVENT AND LUBRICANT PROPERTIES (THEY ARE CALLED AROMATIC BECAUSE THAY SMELL SO GOOD, BENZENE/TOLUENE DRYCLEANING FLUIDS ARE ALSO AROMATICS AND CAUSE CANCER BUT THEY SMELL GOOD TOO..). Whether that's due to using additives or not using additives is for the anecdotal evidence pile. This chemical is a petroleum-based fuel that provides long-lasting protection and can be used in a wide range of engines and machinery. much of northern New England's gasoline comes arrives. As a result, your car will have to work harder to generate enough power to crank the engine. Is Marvel Mystery oil good or bad? The extra few bucks may not really be necessary, but is not hurting anything and to my mind is worth theprecaution. After posting Mr. Parker's article, I had a personal experience with been a lot of talk about what to do so that lead fouling can be scavenge the lead from the fuel to keep lead from ever forming on vital It soaks into the carbon and eventually Change the oil and filter regularly, take it out on the highway a few times a year and blow the carbon out and when required in 75 or 100 thousand miles when you have to open the engine check for valve seat recession and report back. They serve comparable purposes but with subtle distinctions. Marvel Mystery Lubricating Oil is safe for catalytic converters and oxygen sensors. But the Marvel Mystery Oil helps prevent this from happening. But adding it to an engine with no issues offers no benefit and can actually create issues as it reacts with the materials some gaskets are made of. Also, some others stated that the price of this additive is quite high. While dibromoethane was added to leaded gas to do the same, some lead oxide did stay in the engine. By When the fuel in the tractor is about a month old, I drain and filter it then throw that into my '71 Chevy van. about the same thing, with small changes in the recipe, so as not The local airport guy said that the AVGAS has so little (ie NO oil base) and Low Lead (thus 'LL' that many people all Marvel Mystery additive (lead substitute found at every auto parts store) to lubricate the system. Pretty sure it didn't require any special fuel back then. You probably wont be able to tell any difference, but I do this on occasion and it makes me feel better. I don't think there It's mostly mineralspirits with some light oil, red die and fragrance added. I wonder if that's not the "secret ingredient" in MMO. AFAIK GM never put better guides in the small block Chevy, they just kept drilling holes in the cast iron like they had been doing. MMO is basicly automotive ATF. i have a 2001 astro van 6 cylinder vortec with 250thou on it.. i bought it a year old .. an runs like a spanked race horse.. use marvel EVERY fill up.. no knocks an pings ,, just flat out gets it..and with this gas today ,, corn gas junk,, you better use something for to help.. its the engine destroyer..i even use a 1/2 quart in my oil at oil changes.. Nice i really enjoyed reading your blogs. everyone was looking for a lead substitute in forum. Back in the 50's the Marvel Co. sold automatic dispensers for their product. That hot topic debate was even earlier in the 70's. Why does this happen? It was used to scavenge trace and unburned particles out of the fuel after combustion. This makes sludge and corrosion accumulate and causes damage. Are available for most engines now and should be considered whenever a head come off. I would also change to synthetic motor oil although, I would like to hear some experienced opinions on this. Our editors pick the products & services we write about. I contacted the maker and he asked what fuel I was using. Your donations help keep this valuable resource free and growing. Inquiring minds want to them my engine had quit and would they please send someone out to give me Marvel Mystery oil Marvel Mystery oil. Well, substitutes for leaded fuel, here's something I've researched, as I own an older car. Marvel Mystery Lubricating Oil is safe for catalytic converters and oxygen sensors. Deutsch; English; Franais; Portugus Ninety-five percent of customers gave it a four-star rating or above. I have a 1966 Chevy 327 in a low-mile, original pickup. The quality of oils and the precise metering of fuel has nearly eliminated the varnish and gumming problems for cars driven under normal conditions. Login; Register; Espaol. When the Cub engines went down to idle speed in line off the carburetor, hook up a tube, and run Mystery Oil Pierce was best known for his invention of the "Marvel Carburetor", which became the standard automobile carburetor of its time. I have also seen boaters with oil injected outboards run MMO in the fuel as an upper cylinder lubricant. I can build an engine, but, I can't drain oil without a mess. A quart of MMO in the oil will help clean up a sludged up engine and free up piston rings that are stuck in the piston grooves due to gum and varnish. You have a RPM drop that is excessive, and run the engine that are most common use MMT and are more like an octane booster. A mechanic I know says to put a little of this in. manufactured without [additives]. I use Shaler Rislone oil treatment, which is green and therefore politically correct. In a hard sealed full container (no vent), it should last a while. Nothing else intervened and nobody else touched my engine. However, the carrier is toluene, and By TheTurtle March 3, 2018 in Vintage Mooneys (pre-J models) Share More sharing options. which I adapted here with his permission. I had a lot of trouble with my snow blower this year. Share Followers 0. I don't remember hearinganything about valve seat recession from the mechanics I hung around with,. including the guys who did marine engine rebuilding, fire departmentcompetition trucks,and race engines. high manifold pressures the wartime engines were operating at, Tetra Ethyl Timothy. Thank you. Marvel MM13R Mystery Oil. So, whats the verdict? I know this has been talked about before but I didn't see any information specifically about original, un-modified engines-- ones that haven't had hardened valve seats put in like mine. So if you run a multi viscosity oil such and 15w-50 you are changing the properties of the oil, and potentially reducing the oils effectiveness. on cumbustion chamber walls, valve guides, around the valve stem, Then, in the new oil, Regular use can lead to improved fuel economy. 4/ Marvel Mystery Oil Vs Seafoam: Which Is Better? further need for TCP. Use additives if you want, it won't hurt the engine. Many believe that when used correctly, it can do good things in your cars. It only takes a few ounces of I use it some times for short term preservation because I like the smell. Mystery Oil also improved gas mileage and minimized engine wear. Remember too, You are actually in error on many of your assumptions. This cleans the carbon and sludge collected in Marvel Mystery Oil is an automotive product of the American Marvel Oil Company, [1] founded by Burt Pierce in 1923. off season, so there was never any problem with the carb gumming up. This If the gas has Ethanol, I also add appropriate portions of Star-Tron. Valves on 327 engines have aluminized faces to retard the formation of deposits, thereby increasing valve life and reducing maintenance requirements. I also add it to my wifes gas engine fuel tank as a fuel system cleaner & lubricant.. Sitting around is no good for old cars or the fuel in them. Posted September 2019. Obviously I had a dirty injector and MMO cleaned it fairly quick.Im at 230k miles now and do a maintenance dose at each fill up and cruising good. This is generally regarded as good stuff, Not sure if still available but have a few years supply. not do their job. Marvel oil is used in the gasoline of inboard and I/O engines as an upper cylinder lubricant, and to lubricate fuel system components,( especially the fuel injectors). Discussion in 'Old's Cool' started by lucky6600, Dec 1, 2010. This improves your gas mileage by increasing the . There were re-portly 7 different cylinder head redesigns in 1973 and 1974 until all the problem were solved in the 1975 and up V-8 heads in particular, these are generally the 502 heads, a little bigger port, a little bigger valves, and supposedly induction hardened valve seats. However, I wonder what adding oils to the fuel may do if the engine is prone to detonation or ping, as if your engine "uses oil", that oil introduced into the combustion process usually actually increases detonation and/or ping. I wouldn't call Marvel Mystery oil a "lead additive." Marvel Mystery Oil was formulated shortly after World War I by an automotive engineer named Burt Pierce. fuel to form lead phosphate, which comes out of the exhaust stack as a grey Simple. To prevent oil from thickening in cold weather, add the product to 20% of the crankcase capacity. He explained why in a post on the Cub Builders mailing list, Gas was unleaded until compression ratios started going up in the '50s. Sale. was also left to ponder what would have happened if I had overshot and LRDaum. So it must be scrubbing a bit of carbon off. the fifth one says let me check and I will get back with you. How much MMO do you use? bromide has to be at a certain temperature to work correctly. RVP has nothing to do with octane and is almost always lower in modern gasoline than it was in the old days. TCP to treat 10 gallons of gas. This will prevent the formulation of sludge and varnish build-up in the crankcase. and on the spark plug. The oil will soften the carbon buildup in the heads and on the stem side of the valves. 2/ Will Marvel Mystery Oil Reduce Oil Consumption? YMMV.foot note; I ran other cleaners on occasion but still developed a dirty injector. But aviation fuel continued to contain lead, so the In very short order this one seat dramatically ate itself away. Three grand for the car and three grand for the engine. So, "How do it woik?" So, whats the truth? Hardened exhaust valve seats on the 327 engine reduce wear and distortion-- insure better valve seating. I use MMO instead of Ed's Red for use inside the house (still have part of a gallon can). Just finished my third overhaul, this time I had to replace the guides for the first time and fix 15 cracks in the block. | Daniel Ford's books Hard seats are added to earlier heads by machining out the old seats and installing an insert. Regularly use Marvel in your oil and fuel for a smoother, quieter engine. If you want your engine to last as long as possible add a little Marvel Mystery Oil, Bardahl, Redex or your favorite upper cylinder lubricant to the gas. For years this guy believed that Marvel Mystery Oil (with the pepperminty smell) was the hot setup for mixing with gas in his old 4-strokes. Back in the late 1940s and early 1950s, at military air bases The 'lead replacement petrol' wasn't doing any good at all. Once we started using top oil, fuel pumps lasted all season.Can't say what Marvel will do for seats but we saw less guide wear with top oil. Required fields are marked *. Along with being better fuel, I make sure it flows through the carb as fast as possible. Unlikely that you'll see any notable damage to your pickup's engine using straight unleaded gas. These long and hard grades some at over 7% especially in summertime heat will really pound seats out if doing it on a daily basis. That would most likely cause catastrophic engine failure. You may also use Marvel Mystery oil as an oil addition in the crankcase. needed to go around again. Not documented, but everything about the vehicle leads me to believe it's accurate. Marvel Mystery Oil is top end lubricant , not an octane booster. "High alloy steel inlet valves. named Rick told me that TCP stands for Tri-Cresyl-Phosphate. At the temperatures found in the combustion chamber of a cylinder, MM oil will be vaporized. So does Amazon if you click through to that store. Slippery stuff! If you ever do get severe valve seat recession, the cure is to install inserts. Anyone who has used them knows they work and has had a good experience with them. From the stories I had heard I figured my carburetor must look like a glue factory inside. gallon of fuel (4 to 6 oz. Use one pint Marvel Mystery Oil about 5 hours before oil change. I presume this was about the most de-tuned version of the 327 (just my guess). formula was purchased by ALCOR. For instance, if your engine requires 5 quarts of engine oil, use 4 quarts of oil and 1 quart of Mystery Oil. OR THE CROWING OF THE NOBLE COCK BENEVENTANO. Thank you. MMO may improve pump gas, but there is no need for it in avgas. mogas. avoided in the smaller and older engines. He spends his weekdays working for his garage and writing stories for oilsadvisor.com. The good of E-85 is it's 105 octane, the bad is the ethanol you have the lower your gas mileage gets. the Warbird's Forum Born in Chicago in 1923, Marvel Mystery Oil was developed to combat deposits on carburetors caused by poorly refined gasoline of the age. This diesel fuel additive does not comply with the federal ultra low sulfur content requirements for use . Perhaps there is no consensus on this topic. Jul 14, 2017. Paul the reason I said the middle 70's was because we all got concerned that the gov. The rest is history. Don't worry about it! However, nowhere on their website, nor in any information I have seen, is the claim that it can replace lead substitutes. Or is it not really noticeable? I have never had issues with even square port heads with valve recession and I rag the heck out of my cars and used to cruise around the desert at 120 M.P.H. Joined: Feb 27, 2010 Oddometer: 2,245 Location: CT USA. Since 80-octane fuel has disappeared from Michigan, there has Cleaning firearms with Marvel Mystery Oil? Could you share with us your experience of using this MMO in the comment box below? a prop? Thats why besides being a mechanic and technician, he started his writing for an auto blog. The problem turned out to be one of those new condensers. The product will help release any corrosion that is causing the spark plug to seize. It's easy! Copyright 2023, Antique Automobile Club of America. How many of us taxi at this RPM? They claim that the engines run VERY SMOOTH. When valves are beginning to stick, it will However we are addressing two totally different problems. reserved. Dan Ford, Other websites: Air cooled VW's loved MMO for long road trips! Mystery Oil is a top cylinder Keep on posting. Anyone who has never tried them will decry them and put forward all sorts of 'proof' that they cannot work. The "Turbo-Fire" 327, by comparison, had a 10.5:1 compression ratio. They did not live very long. This is right. Some people say its great because it helps clean your engine and keep everything running smoothly. The following is my experience with valve seat recession. Benzene actually used to be in gas as an octane booster (it was also used as an aftershave for a while - which is scary considering how carcingenic it is). Everyone was gonna need hardened seats installed in their heads, or need to use smog-era heads with the induction hardened seats, etc. ADDED TO ENGINE OIL:Use Marvel Mystery Oil or Marvel Ultimate Oil in the crankcase to enhance oil lubrication and sludge control. Added to oil it prevents valve sticking and clatter, fortifies . It was going to be extraordinarily expensive to do it all at once, changing tanks, pumps, and refineries, so they convinced the government that there were all these poor schlubs out there whose cars were going to self-destruct without the "cushioning effect" of the precious lead. With no alcohol in the system, the gasoline stayed fresh through the effectiveness was discovered in 1921 by the General Motors research laboratory, which had spent several years attempting to find an additive that was both highly effective and inexpensive. When piston engines passed by the wayside in the military, Shell Oil bought My 10.25:1 400 is kinda marginal so I add something mainly for my peace of mind. In the winter, oil thickening can cause slow flow or sometimes not at all, putting a lot of strain on the engine. It's illegal to use on a public road for the second time! Well, there you have it, that engine already has induction hardened valve seats, so no worries, DRIVE ON! The engine ran smoother and quieter, almost silent at idle. was going to eliminate lead completely. for every 10 gallons of gasoline. I think he was right thoughthe internal explosion of the diesel fuel as it gets compressed between the main bearings would probably clean it up pretty good, it would disassemble it for me, then if I didn't die, I could rebuild it in the parking lot over the next few days (if I didn't get arrested) and it would no longer use any oil. It does not mean that you need to cut the link with Seafoam . So, when it is about Marvel Mystery oil vs. Seafoam, the Marvel Mystery for around $4, Seafoam charges you double of it for the same quantity. Then there is ALCOR TCP. '66 SBCs ranged from a 195hp 283 2bbl (regular fuel) all the way to a 350 hp 327 with many stops in the middle (could get a 375 hp in 65). there are two STCs on the market for mo-gas, EAA and Petersen. Great stuff and recommended by a mechanic. Learn more. Neither should be used for the first time After a few such experiences, the airport put As a moderately priced precaution, I add 4 oz of Marvel Mystery Oil, and 1 oz of Alemite CD-2 for each 10 gallons of gas. Yeah, anything can fail, but there is no way I would take that engine apart because of the valve seats. I would also change to synthetic motor oil although, I would like to hear some experienced opinions on this. Made an exceptional difference on a 4.3L GM engine with 40K of mostly in town driving. It can free up stuck lifters and help loosen up dirt to flush it out. All your true octane booster that do any thing are toxic , highly toxic , which why they took them out of gasoline and will not sell you any that does much good. '68Jav, and '90 Gold Rush trailer. https://www.consumerreports.org/car-maintenance/study-shows-top-tier-gasoline-worth-extra-price/. Going on 6 months with no awful clicking noises. AMC engines never really have issues with valve recession as they used good materials in their heads. Unleaded fuel was a very hot topic in the mid 70's along with the unleaded only 1975 cars with catalytic converters. Every time I have ever broken into or had work done on one of my engines, they have been clean and free of sludge. Marvel Mystery Oil. Engine is stock - never been apart and has the 2100 carb. Colder than that, and we couldn't fly, The original oil enhancer AND fuel treatment cleans the engine from the inside out, increases fuel economy, and protects against temperature extremes. As I understand the I had to dismantle it, clean them with bleach and then reassemble it. Hampton Airfield 7B3 is located on the New Hampshire seacoast, So, by doing it before the seats fail, you are just doing something ahead of time that might never need to be done, and might cause a failure in the meantime. Lower vapor pressures reduce emmisions of VOC in storage facilities and fuel tanks and fuels with high vapor pressures are not needed in modern high pressure fuel delivery systems. Ryan has got more than 15 years in the auto industry. He then explained that some 'lead replacement petrol', because of the additives they were using in it, grew a fungus in it which coated the tin pellets in the canister and prevented the leaching. I don't think I've seen so many responses so quickly to a post before. Question? I have been driving a 10.25 compression ratio 401 Buick for the last 15 years on regular pump gas. For years we raced methonal fueled sprint cars without top oil and dispite proper mantainance we rebuilt Hilborn fuel pumps 3-4 times a season. TEL had been identified chemically in the mid-19th century, but its antiknock effectiveness was discovered in 1921 by the General Motors research laboratory, which had spent several years attempting to find an additive that was both highly effective and inexpensive. Sign in or register to get started. There is no reason to use it in a "clean" engine. A petroleum distillate (hydrotreated heavy naphthenic) is included, as is a petroleum distillate (Stoddard solvent). Petersen's STC allows for mixing of av-gas and mo-gas. They said that it caused oil leak in his Chevy Silverado 2004. MMO goes through I thought I had successfully purged all that stuff from my brain like a bad dream. on unleaded and no additives. It contains additives that help lubricate and protect the engine. I installed new pistons (and liners) and had that one seat cut and lapped in the valve. Marvel Mystery Oil and Lead substitute. The old timers would use it Instead of a 'lead substitute', try Marvel mystery oil. Moving on ten or fifteen years, we were using 'lead replacement petrol', which had varying degrees of usefulness I'm told. WHEN I DID THIS I ALSO CLEANED OUT THE PUSH RODS AND POURED MMO IN THEM. I'd converted to LPG and one of the valves simply ate away at the seat at an horrendous rate. Back in 2016 I started having poor idle symptoms and stalling at stops. See Also: Lucas Vs Seafoam: Head-To-Head Comparison. we weren't allowed to prop the planes without someone in the cockpit.) Probably not an issue with racing, however. That's probably more than you wanted to know about benzene - and I don't know why I remembered it. EAA has an answer, after 5 different people and nauseous each time he gave a lesson. This was a hot topic in the late 80s and early 90s. Like several other similar products that date back several decades Marvel Mystery Oil seems to be a legitimate detergent additive that will reduce varnish and gumming in an engine. there's some xylene in there, too. No problems. OTC and Third Party Oil Additives Substitute for Marvel Mystery Oil 1993_VG30E_GXE Dec 12, 2009 Not open for further replies. It was It has everything it it your engine needs. As for using a lead substitute, I don't know how anything that wasn't actually lead could be expected to have the same properties. The kerosene was what made it effective with the first hydraulic valve lifters . Everyone must know about Mystery Oil. There is a very good article on RVP and specific gravities as well as othe things relative to custom blending of racing fuels available from Torco and I beleive Sunoco has some litteriture also. There wasn't widespread valve seat recession and engineers at the oil companies wondering how to keep it from happening. 2-3 ounces per 10 gallons is enough. Oct 11, 2006 . (If you Problem with regular Marvel Mystery Oil is that it will combine with castor oil residue and, over a period of time, form a hard red crud. I use it at every oil change to replace one quart of new oil and use it regulary in my fuel tank. The thing is, most old engines have been rebuilt with hardened valve seats. It was soon discovered that it resisted detonation also and was intsrumental in the developement of more powerefull aviation engines during WW1. Marvel Mystery Oil can be used to keep the fuel system clean. Therefore, important engine components will not be adequately lubricated. Marvel MM13R Mystery Oil - 32 oz. Also the single quad L88 at 430 hp and the pundits top tripower at 435. The leading theory is normal drop. MMO isno mystery. Add To Fuel To Clean Engines And Increase Gas Mileages. Yes, that explains how it keeps the bugs out of your engine. 72 octane is the highest grade of gasoline that can be Started it up and of course it smoked for a little while, but I couldn't believe how much better the thing ran. The popular theory is that the MM oil acts as a vapor blast and keeps carbon and lead deposits soft and passing through the exhaust valve rather than adhering to the valve, seat, or guide. 80/87 has 0.50 ml TEL [tetra-ethyl lead] per gallon and is dyed RED, 91/96 has 2.00 ml TEL per gallon and is dyed BLUE, 100LL has 2.00 ml TEL per gallon and is dyed BLUE, 100/130 has 3.00 ml TEL per gallon and is dyed GREEN, 115/145 has 4.60 ml TEL per gallon and is dyed PURPLE. They also got mogas STCs for the airport's fleet of Cubs and other So it seems that the residual lead on the seats from beforehand had continued to provide protection, but once cleaned off by cutting the seats valve seat recession commenced. Low HP cars are doing these grades in low gears barely making 40MPH. Added to fuel: At every fill-up add 4 ounces of Marvel Mystery Oil to every 10 gallons of gas or diesel. Burns Hotter of course, so what Plum says is true for both Marvel, or crankcase oil getting burned in a wore-out cylinder. per 10 gallons of fuel). What about the ones that haven't? by the five-gallon jug to use in my lawnmower, chainsaw, and snowblower. Reply #2 on: September 30, 2020, 09:06:35 am . Period. I'm not sure there are any Lead additives anymore, anyway it is illegal to use leaded fuel on any vehicle driven on a public road, street, HWY, Motorway, or FWY. Don't listen to them. Can MMO be used as a lead substitute? Tetra-Ethel Lead is not an octane booster either. Product description. So after a year or two, the STCs All the other valves and seats were untouched. The series ran for five seasons on CBS, lasting 158 half-hour episodes, all filmed in black-and-white.Creator/writer Carl Reiner had told the cast from the beginning that . My understanding is that valve rotators were developed to prevent lead deposits. Another way is to run about three tanks of mo-gas and I hear a lot of disagreement about the need to run lead-substitute or lead additive in older engines. The customer rating for Marvel Mystery Oil (MMO) is 4.7 out of 5 stars. Marvel tells you on the can how many ounces of mystery oil per gallon (s) of gas. venerable taildraggers.
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