Originally posted by Silversvt:
Still, several tenths in the 1/4 shouldn't justify my SVT getting passed by a stock SE at the end of 3rd gear... She's not using up any oil, but I think my baby's sick 
Do new spark plugs make such a difference? Mine are original and my engine has 60,000 miles... Change those plugs! Even though they are made to last 100k miles, that does not mean you will get optimal gas mileage and performance. Buy some new double platnium plugs (NGK, Bosch +4, Autolite) and you'll notice a difference next time you hit 4000rpm.
I plan to change mine at 30k miles, as I am only at 15k now. On my 99 F-150, at 40k miles, I notice it being a bit being slow. Idle is rough too. Not as noticeable in a V8, but... Plan to change them this weekend.
