Stock ACDelco's or NGK TR55's

 

Yeah I have always been a big one for running the stock plugs too. Just put a set of E3.62's in my tahoe and noticed a huge difference in the power and pick up. Can't comment on the mileage yet though, haven't run the half a tank of gas that i have in it out yet though I would have with the original plugs in it by now but in 3 days of off and on driving the needle hasn't moved yet from the half a tank mark.

Normally I get 435 miles to the tank (14.3 miles to the gallon on a 30 gallon tank) and I have right at 340 on it right now with half a tank. I'll wait till I can run a whole tank through it before I post the mileage difference for sure if there is much of one. The only mod I have made to the motor so far is adding a K&N air filter to it which also made a noticable difference in the pick up and mileage. The original one was almost 3" thick and made of tightly packed filter material the K&N lets more air through and filters just as well without all the resriction of the OEM type filter.

I'll post an update for the mileage once i get to see that part myself.

 

V-power is correct, that's the copper TR55...the electrode has a "v" shape notched into it...