on chrysler cars/trucks i have opened the plug gap to .045 and all ways run a heat rang colder. cause i always drive harder than most people. how ever i cant say it really helps.

 

Every dodge dealer ive spoken to says if the truck wasnt installed with them dont use them just a gimmick for your money.. so i use oem autolites that came with the truck.. i recently just had a tuneup done (after 2 yrs) my god it was like driving a new truck.. i forgot how it drove.. it can still light em up in the rear.. :P

 

3923's here and happy