Quote:
Originally Posted by phenixdragon
lol, cracks me up to see someone things this.
Lots of posts about this but basically the higher octane means a slower burn which means have less combustion happening. Some cars are designed for less combustion as they are pushing out more power per combustion. Putting 91 in a car designed specifically for 87 means you are putting out higher power per combustion but you now have less combustions happening which means the over all power is lessoned. GM spent a lot of money over the years designing this motor, and if they felt there was a performance increase they would recommend higher octane. I doesn't hurt the car to do it, just you are taking a performance hit. Now a car designed for higher octane should never have a lower octane in it, not only does it decrease performance but it also can harm the motor.
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air is thinner up here too, the notice is substantially less. finding a way to draw more air into the motor ftw...