Quote:
Originally Posted by lewdog
Marvel Mystery Oil. So what's the deal with this stuff? My wife's car just hit 100k and my FIL suggested we start adding this stuff. Said he was also putting it in the Mustang when he did oil changes and sometimes when filling up. Does it actually do anything? It's only like $5 a bottle.
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I use MMO in all my engines that are older. I mix it in the gas for my lawn mower, chainsaw, weedeater, and snowblower. I also mix it in the gas and oil (4oz per 10gal gas, and replace one bottle of motor oil with it when I change the oil). Finally, I use it as a very good solvent to break rusty bolts. Put some on, let is set a couple days, and it usually works.
It's old school stuff for sure, but lots of the old car guys swear by it.