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Re: Spark plug question
Yep the others are right, I've yet to find a spark plug that will increase power and fuel economy by any significance. Definetly change them every 60,000 miles or so to keep your engine running good!
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2000 Chevrolet Silverado Regular Cab Short Box
4.3L Vortec - 5 speed
Ion Alloy 16x8" chrome wheels
Magnaflow Catback Exhaust
K&N Intake, Throttle Body Spacer
GM Automotive Technician
Previously - 2003 Chevrolet Cavalier
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