Ive always been told to put Optimax in my M3 (it does state super plus on the fuel flap) but the other day I was nearly out of fuel so stopped at a BP hoping they did a super plus (after stopping earlier and seeing the station didnt do a super plus). I put a tenners worth of 'Ultimate' in my car to do me until I got to the local Shell but jesus H von christ it doesnt half go with this ultimate in it!!!
Do I keep using this or go back to Optimax?
Which fuel???
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Falkster
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appletree
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av been putting ultimate in my IS and i think it ran better on the ultimate than optimax or normal unleaded BUT now av put it in i'am a bit reluctant to put a tank of normal in incase there is a letdown then am stuck with it! 
that ultimate does reckon to give cleaner running and all that. Which is partly why i started using it to see if it would help with my once noisey injectors.
that ultimate does reckon to give cleaner running and all that. Which is partly why i started using it to see if it would help with my once noisey injectors.