View single post by RichD
 Posted: Sun Aug 18th, 2019 11:40 pm
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Joined: Wed Dec 7th, 2005
Posts: 2116
I had an Audi that was very sensitive to using anything but premium. Any modern car will compensate if it detects preignition by backing off the timing so it is doubtful you will hear knocking. More likely loss of performance and poor fuel economy. The Audi ran just fine on Mexican premium. Expensive though. Milage was the same and based on the computer, not the amount of fuel shown on the pump. If you are worried about harming a high performance car, I don't think you have to worry.