Quote:
Originally Posted by nostatic
fwiw I ran 87 in my '79 without issue. On track days I made sure that I had 91 in the tank, but for regular driving I never noticed pinging, etc.
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A '79 SC, which is a fantastic car, only had 8.5:1 CR IIRC. It's an 87 octane car all day long, even at the track it would not make a difference. Later ROW 911SCs and all 3.2 Carreras were premium cars, it's all about CR, nothing else.
Actually, on modern cars w/ more sophisticated ECUs it can be about something else. My dad's Lexus RX 330 states in the owners manual that it can run on 87,
but for maximum performance use 93. IOW, it will adjust timing for the octane.
