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redorchestra · 08-04-2012, 08:06 AM

I mistakenly filled my car with high octane gasoline. my mileage which has been mid 30s, jumped to low 40s . can premium gas do this? will it hurt my car?

08-04-2012, 08:06 AM	#1 (permalink)
redorchestra heading for 40 Join Date: Feb 2012 Location: Car Free Island Posts: 163 Hong Kong MTR - '98 Bombardier/ nee Adtranz A-Stock 5 paired doors 90 day: 102.63 mpg (US) Thanks: 45 Thanked 25 Times in 14 Posts	premium gas in a regular car I mistakenly filled my car with high octane gasoline. my mileage which has been mid 30s, jumped to low 40s . can premium gas do this? will it hurt my car? __________________ does my sig work now?