Re: Do you use 87 or 89 octane?
I went for a long trip and put in 91....no improved mileage over 89.
I started my car running at 87 and when I switched to 89 better mileage which equaled the increased cost of 36 cents a gallon.
The moral of the storey of the doc, is don't put in more than your car reccomends.
Thanks for specifying DrivenDaily, I meant to because I did to the test with nil results.
2012 LT Platinum with Performance Package(V6), Crystal Red Tintcoat
Farewell to 2011 2LT v6 Black Granite Meteallic