IIRC Chevron has no ethanol in their gas. Quick question though, the Chevrons around my area only offers 91 or 94 sometimes, but sometimes I get gas in the states they only have either 89 or 92. I'm a complete noob on this stuff, so I was wondering if it's okay to mix 91 with 92 if say I have a half a tank of 91 gas left in my car?
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