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