The dealer I bought my rover from recommended 89 or above for the gas quality. I've filled it a couple of times with 87, and a couple of times with 89. I don't notice any difference in performance whatsoever when I use a higher grade and don't hear any knocking or pinging.
What grade do you use, and do you have any evidence that using a higher grade has any beneficial impact on the longevity or performance of your car?
<Discuss>
What grade do you use, and do you have any evidence that using a higher grade has any beneficial impact on the longevity or performance of your car?
<Discuss>