Quote:
Originally Posted by lkchris
It's irrelevant to current car owners.
The point is, the higher your compression, the more efficient your motor. This is a fuel saving thing and is occurring to urge manufacturers to produce higher compression engines. Turbocharged, maybe.
A given motor only needs the octane it needs and feeding it anything higher does nothing except possibly waste money.
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True, but it would be nice to be able to get 93 octane which are cars are designed for. Modification to fueling and ignition timing could also yield power increases if you have access to higher octane fuel. Back in the day I would advance ignition timing at the distributor as much as the fuel would allow before ignition knock was induced. If the car would run fine on regular you could run super and advance the ignition a bit and squeeze some extra power out of the car. Obviously this was back in the day of distributors.
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