Resonating with your signature, Quicksilver.
Being a former Jazz Drummer, may I suggest adding the term "Synergy".

Oh, and on the fuel economy topic: Ditto. My 2000 X5 4.4i has a combined Ave. MPG of 17.3; 14 when towing the ski boat, 15-17 City; 18-23 Hwy. Interesting that 80MPH sems to produce the best Ave. Hwy MPG.

SkidmarkX5

16.2 in city/mixed driving and 24 on highway. The truck sits on 20" wheels though.

21mpg combined

18.5 mpg combined - 2005 4.8is

E53 X5's real Gas mileage - POLL
 

'01 3.0 Manual 50/50 city/hwy and 100 miles per month tractor duty pulling 6000# load.

2 year average - 18.6 mpg.

Regards - M54 Lover

10.6mpg on OBC

2006 4.8is

Mostly City driving. Just had alignment done. Didn't reset the OBC yet. BTW, how do I reset it anyway?

Going to do plugs, clean Maf, new air filter, and run some injector cleaner. We will see. Only had the car about a week. So need to do some maintenance.

But yea 10.6mpg sux. Glad I know where to get more fuel. lol.

10 - 12.6 short trip , stop and go , driving uphill with an average speed of 32 kmh << 7 or 8 mpg in sport mode>> but i get 17 -18 on the highway
it is a 2001 4,4 with new maf spark plugs air and fuel filter but probably a failing o2 sensor< no cel>:dunno:
nb: i reset the on board computer every morning lol

I set one of my calculators about 10,000 miles ago mix of city/ hi-way 14.6 mpg. The other one I set for hiway trips last Sunday did 400 miles all hi-way 17.9 mpg.

I didn't buy it for the mileage. I bought it for the sport of it.

Do larger wheels improve your mileage? because that is 15% better than what I'm getting on stock wheels.

The 20" wheels should be heavier and therefore requires more power to push them. Assuming the diameter of the wheel/tire combo, you should be losing some mileage on larger wheels (if their heavier)