MARVEL MYSTERY OIL® ADDITIVE 1 gal.
Improve your engine and your fuel economy
Marvel® Mystery Oil Additive can improve and protect your car from the inside. Add it to every tank of fuel and every oil change, and you’ll clean and lubricate fuel injectors and carbs, improve fuel economy, help prevent valves from sticking or clattering, and prevent oil breakdown from extreme temps.
Net weight: 4
Add to every full tank of gas or diesel. 4 oz. for every 10 gallons of fuel.
Replace one quart of oil with Marvel® Mystery Oil in standard 5-quart engines.
Add Your Own Review
Joseph | Duluth, MN | 5.7.2013
Must buy this product it worked so well for me.
Marvel Mystery Oil
Alan | Soddy Daisy, TN | 6.25.2013
I've been using MMO for over 13 years. It neutralizes the harmful effects of ethanol in fuels. I run MMO in every gasoline engine I have; trimmer, tiller, mower, generators and ATV. Never have I had carburetor issues from fuel left in anything that I've left sitting for months. It's better than any fuel stabilizer on the market. It works.