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02-22-12 08:50 PM - Post#2194063 In response to busterrm
Talking from a stock point of view here.
I am a believer in running A/C's in GM, Autolite in Ford and Champions in Chryslers. On more than one occasion a misfire I have traced back to the plugs. Even shortly after a 'tune up'. I didn't believe it until I actually had a comeback for a misfire shortly after a tune up and I had used the 'wrong' brand plugs. So as far as I am concerned that's I roll in the stock world.
Also for some reason Honda's love to foul plugs to the point they don't start. They get NGK's as do toyotas and subarus.