I average 17.8mpg with city and hiway combined. I reset it three-four tanks of fuel ago and now it has settled at 17.8 and dosent change much, I thought it wasn't that great but after seeing what you guys get I feel a lot better about it.
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X5M, Eisenmann exhaust, 22" HRE wheels, catless down pipes, Stage II tune/X5 Diesel, Lowered & Tuned