Is marvel mystery oil added to the gas tank of a car or the oil tank of a car?
- JJLv 71 month agoFavorite Answer
ADDED TO FUEL: At every fill-up add 4 ounces of Marvel Mystery Oil to every 10 gallons of gas or diesel. An average passenger car tank is 15 gallons, so you would add 6 ounces at every fill-up. Regular use can lead to improved fuel economy.
- Anonymous19 hours ago
Put some in all the holes.
- 1 month ago
Either. Depends on where in the engine you need it.