Raleys is a Cali based company, so default uses apcd fuel which is different from everywhere else except SOCAL. Bunches of anti-smog additives not noted for performance or efficiency, juries out on whether they improve air quality. Costco in many locales (except Reno/Washoe county) gets fuel trucked in from non apcd origins. Costco fuel from Carson City is known to be a better fuel and significantly cheaper due to lack of excessive road taxes.
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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