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Actually Costco is top tier but I don't use it. This is what I used today and subsequently found the Costco pricing. Nevertheless, less than 3 bucks for premium can't recall the last time that happened.
Filled up the G wagon today at Costco $2.03 in Scottdale AZ with 91 Octane. Independent is 2.29.
Most of the fuel has 10% ethanol so not buying Costco is top tier.
Like you said Jim, most gas has ethanol. In Michigan premium is typically 93 octane but enriched with ethanol. 91 octane is maximum I've found without ethanol.
Originally Posted by Jim Brady
Filled up the G wagon today at Costco $2.03 in Scottdale AZ with 91 Octane. Independent is 2.29.
Most of the fuel has 10% ethanol so not buying Costco is top tier.