I had to keep my speed down during an AM trip through Chicago due to construction and I was shocked at the fuel economy. This was driving at 62 miles per hour for almost 1.5 hours. There was no traffic, but the construction speed limit was 45, so I didn't want to go all too much over the limit. The car is an '04 530 manual tranny, and I have the 550's wide sports wheels on it. I really have enjoyed this car. All I did was put on M5 sways and it's been a good ride. Not the raw feel and high rpm muscle of my old E34 535im, but nice just as well.

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And it's not set to Imperial gallons I guarantee.