Quote:
Originally Posted by Paul
I've heard that all cars sold in the US must be able to "run" on 87 octane.
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I don't know if the Boxster "must" run 87 octane, but I do know that it can in a pinch. If you put 87 octane gas in, the engine will knock. The knock sensors will detect this and will pull timing until you don't have knock. It kind of goes into a self preservation and protection mode to keep you from blowing up the engine due to bad gas. Performance will obviously suffer as a result of this.
I don't see any mention of this on this board, but I've got a KnockLink system in my car that uses its own knock sensor to detect knock and then displays it for me via colored LEDs in a box I have installed on my dash. This way I know when I'm getting knock and how much.