My dealers here in San Francisco area had many more left over 4.8 07s than 3.0s. Different demographic? One sales manager said that their sales were 70% 3.0 and that the overall mileage difference was 20%. I have not confirmed this with hard numbers it's just what these guys told me.

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2007 X5 3.0 Alpine, Tobacco, Dark burl, Prem, Sport, Tech, Rear Climate, 3d row, Running boards, Ipod.

2006 530i Amythest Gray, Sand, Dark burl, Sport, Comfort seats, CA, Sat and best of all 6 speed.

Retired:
2007 X3 (auto)
2004 Z4 5 Speed, Sport (RIP)
1995 325i
1989 325i