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V6 and I fill with regular. No reason to burn premium. No improvement in gas mileage or response. You will, however notice a smell. And you will know you are burning money. When running premium, in my experience, the V6 ran rich and smelt like it. That and made me clean the exhaust tips more.
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White Fender Hashes from Big Worm Graphix with Custom White Bowties
GM Factory Remote Start and Factory Key Fob
SS Fascia, Factory RS HIDs, Plasma P13W fog lights
Non-RS to RS and fog light harness by Gen5DIY
LED Interior, Trunk, and Licence Plate lights in white
ZL1 Spoiler with Gen5DIY harness
Factory NPP cat back
Blacked out tail light bezels
Factory 20 inch wheels wrapped in Nitto Motivos
Lowered 1.25inch on Eibach Pro springs
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