Quote:
Originally Posted by rudywalker101
I'm a new HiHy owner and while I'm still in my break-in period, I noticed a larger than expected change when I used 91 vs 87 octane. Good explanation re compression and advance.
Anyone have sense (data) for % improvements for the various premiums available (e.g. 89, 91, 93, 94)?
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Could you give some more information about your experience? (number of tanks, fuel economy and grade of gas used on those tanks, etc.)
Thanks.