I second these numbers on almost the same setup. I have a '20 G20 330i M Sport staggered 19's. Getting 37-38 highway, 24-26 city. It has 4K miles on it.
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Originally Posted by Beembar51
Picked up my G20 330Xi Msport last Friday. It has 19" staggered wheels with performance run flats. I just did a 300 mile round trip from my home in Venice, Fl to Orlando. The read out said 37.3 mpg. Most of those miles were done at 80 mph. Around town, prior to the road trip, I was getting 25 mpg. Total miles on the car so far are 500. I expect the figures to improve as time goes on and things wear in. These figures are pretty close to those on the 430Xi GC I just turned in. Pretty good in my book.
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