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Until my SS went on a corn intensive diet, I bought all of my local gas from Costco. As others have stated, Costco gas is Top Tier, and in my area $0.50 - 0.60 less per gallon than corner stations, whether they are Top Tier or not. I'll stake my car running problem free and with damn good performance for about 4 years on Costco Premium as proof positive that it is good stuff.
The other cars in our household continue to run on Costco gas. Just not premium.
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2017 CAMARO FIFTY SS CONVERTIBLE
A8 | MRC | NPP | Nav | HUD | GM Performance CAI | Tony Mamo LT1 V2 Ported TB | Kooks 1-7/8” LT Headers | FlexFuel Tune | Thinkware Q800 Pro front and rear dash cam | Charcoal Tint for Taillights and 3rd Brakelight | Orange and Carbon Fiber Bowties | 1LE Wheels in Gunmetal Gray | Carbon Fiber Interior Overlays | Novistretch bra and mirror covers | Tow hitch for bicycle rack |
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