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Detached Member
Join Date: May 2003
Location: southern California
Posts: 26,964
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I used ARCO in my Mazda for years and got consistently 19 mpg. I switched to Chevron and got consistently 21 mpg. I believe its the 10% ethanol in the ARCO. This is after 1000s of miles of driving with both. Also, ARCO charges a 45 cent ATM fee, at 10 gallons in the Mazda, that's another 4.5 cents/gallon. If ARCO isn't 10% or more cheaper, which it never is, you shouldn't buy it. Also ethanol is a no-no or older pcars.
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Hugh
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