I have been using 87 in my 2011 Cruze LTZ, but i am nearly convin ced i will have to use at least 89 & possibly 91 octane to obtain any decent gas mileage.
which grade of gas are you using?
I would like to know what grade of gas you all are using and why. I filled up today with Ethanol 89 octane and thought about getting 87 octane but wasn't sure how good the car runs. I know it increases mpg a little. Can anyone give thoughts or opinions?
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