Join Date: Dec 2015
Location: Central Alabama
Replace once a year because copper plugs are good for ~15,000 miles. Plus, for $10, it gives me an excuse to work on the car.
I probably drive my Redline less than 3,000 miles a year, but I still replace my plugs every January.
To the OP, *always* check the gap on a plug before install. You'll need an actual gap gauge ( the wire kind or a feeler gauge, NOT the cheap "disc" kind )
I find that my car ( 2.8, ported head, etc... ) seems to like a 0.033 gap. Your mileage may vary.
Last edited by Rebel Redline; 08-31-2016 at 04:37 PM.