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Re: premium, super unleaded or lead replacement? (archive)

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Posted by Darren M on July 04, 2000 at 17:30:00:

In Reply to: premium, super unleaded or lead replacement? posted by Darren I on July 04, 2000 at 13:34:58:

There isn`t such a price gap between super and standard unleaded now. I tend to use both actually but believe my car runs better on super unleaded. I read heard somewhere that there is a switch or something near the chip that you can change for the different fuel grades. If you run on octane 98 (super) then I expect you would only get the best out of it if the switch is set to that setting, or the highest setting or whatever.

Anyway, I`m not sure on the switch thing I mentioned above but read about it somewhere, For the past month I`ve been using super all the time and find mine runs better on it.


: I have an '88 m3 & have removed the cats,( still retaining the lambda sensor), and was wondering what grade of fuel you guys run? here in the uk we have a choice of premium unleaded (95 octane ) super unleaded (97 octane) or lead replacement petrol (not sure of the rating). I currently use premium unleaded as it's a lot cheaper , but was wondering if switching to a higher octane rating offers any performance advantage?, or is it just a waste of money?
: thanks for any help/ advice.
: Darren.

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