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Old 12-13-2011, 11:21 PM   #28
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Join Date: Sep 2011
Location: New York
Posts: 9,474
My Ride: '04 330Ci
Now we agree!!

Cars will run with less power and lower mpg.

Originally Posted by trj View Post
I just wanted to tell him to use premium(whats recommended). Of course he can run 89 or lower if he wants to, but it will give bad gas mileage and make the engine work more. The engine will adapt itself to burn more fuel because of less octane hence, will have to work more to burn more fuel.
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