Date: Fri, 16 Apr 1999 12:48:22 -0400 From: "Skip" <skipopnopsampring.com> Subject: Re: Higher octane improving performance?
Manic wrote in message ... >I tried to fill up my tank 3 consecutive times with American super unleaded >(93 octane) in my '98 900SE. The cost was about 25% more but I didn't >really realize increased fuel economy or noticeable performance. >Specifically, the car only felt slightly more powerful and the increase in >mileage was only 8%-12% over the 3 tankfuls driving equally in city and >moderately traffic-laden highway. Interestingly enough, I tried the exact same test in my 98 90SE also. The results were about 6%-7% increase in fuel economy with a similar cost increase (1.34/gal as opposed to 1.09/gal) and no appreciable increase in performance. IMHO, not worth it.
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