Quote:
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Originally Posted by Elk
Quote:
Originally Posted by mocohead
When you are in EcoPro the car runs a more lean map to get better economy. So your car runs as lean as possible which puts it as close as possible to the limit of detonation.
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Creative, but untrue. Eco does not run a different A/F map, it merely changes the foot feed response. All modern cars employ an A/F map which minimizes fuel consumption except at WOT where the map goes rich.
As a separate matter, AKI 89 is fine for the engine under all circumstances. Its use does not place the engine on the verge of self-destruction. 
Stand back! He's running 89! It will blow any minute! |
+1 I ran on 89 on all my bmws in the past in addition to this car, never had any issues with it.