850 km from a tank !!!! .
Depends on how much gas price is.. I generally filled it when its at half,
so average about $35.
325i is good enough, I have both 2.5 and 3.0 engine and both are equally good
you still can open it up once in a while if you want to chance it, I dont anymore,
(cant afford the insurance ..
Go for the premium package, comes with Xenon,, moonroof and a pretty good Harmon kardon sound system, heated seat, memory seat...etc etc.
Pre 2006 will be cheaper compare to 2006 E90 models.
I am still looking for that X3, but I have to sell my 2002 SiR first.