Additives with MMT

[JeepZJ4.0]

A fellow member of the Jeep site I am a member of just changed the sparkplugs on his 02 Grand Cherokee Overland (the 4.7L High Output V8) and discovered the his plugs were almost rusting! He said he was using an additive with MMT. What gas additives have MMT...I hope Lucas doesn't have any.

 

[sbc350gearhead]

MMT is an octane booster. It is found in canadian gas, and outlaw octane boost, along with a few other OTC octane boosters. MMT leaves a red deposit on your spark plugs, but it is not rust.