Marvel Mystery Oil

[Belvedere]

I've heard many say they use Marvel Mystery Oil as a gas additive, and it was suggested I do the same for my '60's Plymouths to prevent carb gunk build-up and other issues in the tank. Why should I do this? And how much each time? After a carb rebuild, my mechanic says I need to add nothing to my gas. Pros/Cons please

[Guest billybird]

Years ago we had gas. Now our cars run off of "liquid chemical compounds" { my terminology }. I refused to use any MMO for years untill recently. Gas composition now; mainly Ethanol, attacts the old car systems in more ways than one. But thats another subject. In short I now use MMO in both my old cars and see much smoother running, less float sticking, etc. The amount to use is subjective. Amounts are suggested on the can, but I always just "pour in a little" periodically. Not too much though as the car may smoke. Having seen the difference, I now believe in MMO.

[Mark Shaw]

An old timer showed me his way to add MMO. He keeps MMO in those small booze bottles from the airlines and adds one bottle for every ten gallons....

[Guest broker-bob]

IF YOU SMELL AND TASTE MMO IT IS THE SAME AS TRANS FLUID ON JAY LENO'S WEB SIGHT HE SAID TO USE TRANS FLUID IN OIL ?????????

Edited October 5, 2010 by broker-bob (see edit history)

[Guest De Soto Frank]

MMO has been around since the early 1920's.

Used in moderation, it is not harmful.

I add 4 oz to each 10 gallons(per label recommendations) of gasoline in my old, carbureted cars.

Modern ethanated fuels are garbage, but most of us have little choice.