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Old 01-09-2013, 05:44 PM
FreqMan FreqMan is offline
Officially Welcomed to the 'Fest
Location: Alexandria, VA
 
Join Date: Apr 2012
Posts: 142
Mein Auto: Alexandria, VA
2012 528i
31 average (comfort mode 80% Hwy 20% city)
15000 miles
Purchased
93 octane premium from Shell or BP

MPG calculation done with calculator - not on car computer which is about 5% optimistic

By the way - I tried 89 octane on 3 tanks. Lost about 4% mpg. Considering the 4% extra cost using 89 octane, 93 octane is about the same cost in the end.
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2015 Porsche Cayenne Diesel

Last edited by FreqMan; 01-09-2013 at 05:46 PM.
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