Quote:
Originally Posted by RealDwC
I'm not aware of much when it comes to BMWs, or truthfully, cars in general.
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If you don't have a high compression engine running with advanced timing and/or high boost pressures there's no benefit from running more than 91 octane, and if you don't drive aggressively no advantage to more than 89 octane. I can't speak to how you drive, but a 320 does not have a high compression engine running with advanced timing and high boost pressures. That's not what gasoline company advertising, or those who believe gasoline company advertising, will tell you. It is what you'll find at sources that have nothing to gain by convincing you to spend more than you need to.
https://www.consumer.ftc.gov/article...ctane-gasoline