Gas Mileage on 2003 530I?????

[Chefini]

We are a military family and I have to travel to LA on weekends from Tucson, AZ. I have been looking at a 3 series but I have come accross a 530 that is in my price range. It has 63000 miles on it and I am wondering what can I expect for highway miles per gallon. Does anyone have any historical data on highway cruise at 75mph and also at 90mph on the straight AZ highways?
Thank you ,
James

 

[Jimmyg50]

According to the onboard computer, I've gotten 34mpg on the freeway at around 75mph. 28mpg is not unusual on the fwy.

I get an average of about 22mpg city/hwy.

Power is fine, IF it's in the sport mode.

 

[catzbmr]

I own a 2002 530i that I took to Colorado with three people and luggage. I got 38 - 40 mpg going around 85 - 88 mph. You can use your cruise control to "fine tune" your gas mileage on the open road. I had a great story to tell if I got stopped by CHP; I would tell them I was conserving gas by using it efficiently, even though I was speeding! In town I get around 20 - 22 mpg.