that's why I got a 4.6is. My long term average is 15. I bet it would be 17 with a 3.0. At today's gas prices that is a difference of about $300 or so per year. I bet I spend more than that at Starbucks and I brew my own coffee most of the time!

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2003 4.6is - SOLD
2003 M5 Imola
2008 Mini Cooper S
2011 Mazda CX9