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      08-13-2011, 05:48 PM   #14

SSSP8SSSP8's Avatar
Drives: 2008 135i
Join Date: Jan 2011
Location: Tempe AZ

Posts: 53
iTrader: (0)

I had the software update and one fuel injector replaced at my last visit to the dealer and I am actually happier with the car. Mileage has improved from 21-23 mpg to 23-25 mpg. I drive a lot of highway to work but I do get on it from time to time. Honestly, can't really tell any difference in power. I live in Phoenix, so I feel decreased power and less performance in these super hot summer months when the air is not as dense and boost is less compared to cooler months.