Quote:
Originally Posted by cmyachtie
I am just as puzzled as you are ,having suffered from these random misfires sinceI got this car for 5 yrs now and only in winter, always run Esso 91 octane which is recommended by BMW for the 545i N62 engine(Esso here in my neck of the woods is my best choice available and have run this in all my previous BMW's for over 15 yrs now)
As far as lack of performance goes, only thing I have noticed is a delay in response when flooring the gas pedal, driving wise nothing noticeable but maybe better mileage (is still early days on that observation).
My last four fill ups have been one at 87 and three at 89 so there was a mix there when switch occurred, but now it would be straight 89 for the last two weeks or so.
Kudos to fasteddie for the suggestion, much appreciated!!!
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Finally did run a full tank straight 87 and find that my sweet spot appears to be 89 as I still encountered two bad starts with the 87. I realize this is not the best scientific conclusion as weather was quite up and down as well during this period. It also seems that the bad starts are also affected by how long it's been since I ran car, parked for 3 days and nights was worst start I had in a long time with 87.
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E39 528i 1998, 5 spd black, 350Kkms and going..with new owner.
E60 545i 2004, 6 spd steptr. mystic blue, Tom Sellick's old car, Adaptive steering, Adaptive Xenons, Anti dazzle mirrors and FAST!!!, BT&Aux+SB Chime+Dig speedo+iDrive discl. Coded
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