Have a 20k mile '04 with 4lb lower, cat-back, CAI, and have been running the Denso Iridium's for several years, but it seems after a short time, they tend to foul. It is likely due to the truck sitting around more then it likes, and then starting and moving it to clean garage, etc... Likely too much cold starts and not enough boosted driving. Nonetheless, I was wondering if anyone has tried the newer NGK Iridium IX's? I like the NGK's and have used them in all kinds of vehicles since I can remember-plus I get a discount on NGK at my local parts store.
Just wondering-any feedback is appreciated!
Just wondering-any feedback is appreciated!