Quote:
Originally Posted by Scott O
I haven't heard a car ping in ages! Have computers/fuel injectors taken care of it or have I just been lucky? That was always a good way to tell if you were using high enough octane gas...does it still work that way?
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No. The engines onboard computer will change the timing to eliminate ping. This change in timing usually results in degradation of performance.
You should normally be using the octane rating documented in the owners manual.
My trucks and the Sentra use 87. My wife's Lexus SUV uses 91. My motorcycle uses 87. The ATVs use 87, but I run 91 because that is what is in the portable can for the motorcycle and I am usually at high altitude. I think higher octane helps at high altitude, but that may depend on if the ATV is a carb. or fuel injected.