Idling is what fouls out the plug. Idling does not allow enough heat to be built up in the engine in order to properly burn off the oil. It is NOT the gasoline brah. The oil is what causes the fouling. Now also the plug is not trash either after that happens. All you need is a spark plug cleaner, sand, and an air compressor to get the plug as good as new again. I have been using the same batch of plugs for several years now. They foul, I clean it, and good as new again.Ya been idling a lot in my yard, ill try to keep that from happening. I run 93 with 15% ethanol. The gas stations are bad here. That's why I'm going with vp..only non ethanol choice for me. Thanks guys!