I've been shopping for a new car and noticed that some manufacturers recommend 92-93 octane gas for the engine in a particular model. AFAIK,
92-93 octane gas has not been available here in California for at least a couple of years. 91 octane is now the highest around.My question is: What is/are the long term consequences, if any, of running a car on lower than recommended octane fuel?
In the short term I imagine that the engine management system automatically de-tunes the engine to compensate.
Dave