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Originally Posted by Peer
trube78 wrote:
> Expect a decrease of about 10% in gas mileage and similar HP decrease from
> using regular vice the recommended premium gas.
A ping-free engine will not gain any power by increasing the octane rate.
-- peer
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You're missing the point. If an engine is designed to use, and benefit, from 93, it will most definitely lose power when using 87. The engine management computer will detect pinging, and will retard timing, enrich the fuel mixture, etc. to stop the ping. It will be ping-free, but will be down on power and will use more fuel on 87.
Running 93 will gain you power in this case.