Marvel Mystery Oil marketing literature claims benefits which include improved lubricating qualities, primarily cleaning and friction reduction The lubricant was used as a fuel additive in a Lycoming aircraft engine which was specifically cautioned against oil additives (Service Instruction No. 1014M Has anyone ever added Marvel Mystery oil to their gas/oil mix. How much do you use per gallon? I also would strongly suggest not using Marvel Mystery Oil in any two stroke engine. Here's my experience with Marvel mystery oil. If your lifter's gummed up, it can sometimes help. 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. An oil gauge inserted into the oil pressure switch tapping in the oil gallery and the engine cranked over. If you must fire it up before the oil change follow the instructions listed on your Marvel Mystery Oil. Marvel Mystery Oil. Discussion in 'Maintenance Bay' started by cfd408, Aug 10, 2018. Page 1 of 3. My grandmother used to extoll the virtues of Mystery Oil in her car. I thought she was daft until after If you follow the instructions, its not going to hurt the engine. That said the best thing you could do is If I search this forum on Marvel Mystery Oil, I'll find 1000s of post claiming its virtues. I'd never tried it myself, though If I do what the instructions sayadd one quart in place of a quart of my usual 10W-30, it seems like it will thin the oil Marvel Mystery Lubricating Oil is safe for catalytic converters and oxygen sensors. Added to gas it cleans and lubricates fuel injectors and carburetors Make sure you follow the instructions on the label for the application your using it for! It doesn't take a lot, whether adding to your oil or your gas. Add Marvel Mystery Oil to gasoline and oil. In gas it cleans fuel injectors, prevents sticky valves, and limits buildup. In oil it eases start-up in cold temperatures, extends oil life, and prevents the formation of acid and sludge. How do you feel about adding marvel mystery oil to the engine oil? 4.0 HO. Has or does anyone do it? Follow the instructions. Helps clean up the insides of your motor. Marvel Mystery Oil offers long lasting protection to your car's hard-working engine by cleaning and adding a lubricating layer unparalleled by the other fuel and motor treatments. Adding Marvel Mystery Oil to your gas tank restores engine performance, improves gasoline mileage, extends spark plug life Marvel Mystery Oil is a type of oil which is used for cars and a preferred oil among mechanics. However, the ingredients for this product are not listed. all u use in ur truck, car, SUV etcit must be used accordin to the instructions on the bottles