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Old 01-22-2012, 12:58 PM
Quacker Quacker is offline
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Location: Colorado
Join Date: Feb 2011
Posts: 824
Mein Auto: 2012 535i xDrive
Originally Posted by Kmdcolo View Post
Colorado only offers 85, 87, and 91. Ralph Schomp BMW said 87 works fine because of our elevation, but I only run 91.
Low octane works in a normally aspirated motor at higher altitudes, but not in a turbocharged motor. I'm sure that the car can and will compensate for low octane in that it will not knock, but your performance will suffer.
2012 535ix Space Gray, Cinnamon, SAT, Premium, Prem sound, Cold W., Sunshades, Gloss Black Grille, Gloss Black Side Markers, RE970AS 245/45/19 non-run flats that run very smooth + quiet and also correct the otherwise optimistic speedo

Last edited by Quacker; 01-22-2012 at 01:03 PM.
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