wow...that must be nice its on avg about $3.30/gal for premium here??? i think you can get around $3.10/gal at some places. i have tried all of them and see no difference i do all hwy travel so i burn it quickly at high speeds. i avg the same off each tank.
i think that Costco and other places simply buy from where they will get a good deal from. so what you get isnt consistant from them but i am sure if would be just fine.
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