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Best plugs for a 4.8

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10-08-2020, 05:34 PM

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00pooterSS

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Originally Posted by Albert88

Hi, thanks for the reply. Engine is pretty much stock, I'm curious if you have tried platinum? If yes, has there been a considerable improvement on gas mileage?

I've bounced between copper, platinum, and iridium with no noticeable difference. The only benefit to platinum and iridium over copper is longer life.

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2004, 2007, 48, ac, autolite, cheap, cheep, chevy, delco, e3, engine, gm, iridium, plug, plugs, spark

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