If you want to save on fuel costs have several maps available. I have a friend that tuned his car(he is a genius at tuning) for different octanes including 87. He uses the 87 map for driving back and forth to work and running errands. He switches to the other maps depending on what kind of racing he is doing on a particular day and what octane he has available from the track. So his range is from a few hundred whp to over 500 whp.
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