i was wondering if anyone has used any other spark plugs on their truck other than the ac delcos? just looking for a plug that may have better performance and fuel mileage. also if they used upgraded plug wires?

 

My only opinion is stay away from ngk. I've heard a lot of bad things.

 

had some of those in a cavalier i had bout 8 yrs ago. seemed good on it. but hell, it was also a 4 cyl car. i read a few bad things on the e3 plugs that are out.

 

You will get the best from the Delco. How ever they are all going to do pretty much the same thing unless they are poor quality. You will not be able to tell the difference. What ever you do do not chose Bosch the are junk.

 

yeah put bosh on my old truck 4.3. ran like crap. seems from what ive read, majority says stay with the delcos