No regrets but yesterday I was on Hwy 50 on my way to Lake Tahoe and during a passsing situation and during the last climb up to the summit I felt underpowered. I did have 6 people in the car and it was packed full.

Is it true that the 3.0 uses 20% less gas than the 4.8?

Finally, I do not tow and have a 2 year lease and as mentioned here I was able to get a fully loaded 3.0 for what a less optioned 4.8 would have cost.

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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