Quote:
Originally Posted by ponjohn
Those numbers are encouraging.
Is it a stick?
Premium or 87?
John
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It's an M6. I will use either 92 or 89 oct. I generally refill at 1/2 tank. I keep 92 in it mostly unless I see like a 10 cents or more price difference between 92 and 89. I will then go with the 89. Mixing between the 2 the octane should be about 90-91. I have never gone with a straight tank of 89.
The best ever mileage I got was a 50/50 mix. On the way to Saratoga and back was all 92. I will add I did not drive aggressively when I got those numbers. I have read where others have gotten similar mpg's.
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