Quote:
Originally Posted by redfox
BMW recommends 93. I've got the P3Car Gauge installed which shows me ignition timing live. Timing retards more with 91 versus 94 from Petro under WOT. Ethanol is not an issue with this modern engines. But you will get more more out of 94.
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Good to know. I will have to try 94 and see if I can feel a difference.