Quote:
Originally Posted by Ciao
The Boxster manual states not to use fuel additives.
Have you used any fuel additives? If so, which brand do you use?
Why does the manual state to not use any fuel additives? Many fueling stations already incorporate additives in their pumps?
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What kind of fuel additive do you want to use? Something to CLEAN the fuel system? If that's the case, as JFP mentioned, Techron is as good as any and better than most. And it's already in the fuel, if you buy that way.
IF you're looking for some sort of performance increase (including consumption) from an additive, you're wasting your $$. (assuming your motor is stock, or mostly-so.)
The best advice is below: Buy High Quality fuel from a busy station. This ensures the fuel is relatively "fresh" and clean.