I am getting about 12mpg in NYC driving, mainly city driving. I know another member here getting a bit less than 10mpg.

I had it about 8 months before I did the tune. Basically, I waited until a sale. I expect to do the intercoolers and Stage 4 during the next sale. I am still considering downpipes.

Honestly, I have never left a vehicle stock. I mod everything to make more horsepower. I came close to buying an X5M; but, I could not comfortably swing the extra $$ at the time. I buy all my vehicles and keep them a while, so once out of warranty, I hope to be experimenting with bigger turbos, injectors, etc, etc.

It's an addiction.