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Old 02-19-2013, 09:44 AM
mason's Avatar
mason mason is offline
Travel Fever
Location: New York, NY
Join Date: Jun 2006
Posts: 2,745
Mein Auto: 535dx
Originally Posted by jadnashuanh View Post
I did drive mine on the Autobahn after pickup, and while I didn't exceed the 100mph (160k/hr) max speed recommended during the breakin, I did drive awhile at that speed and often over 80. With a virgin 535i, on that trip, I averaged about what you did on your V8, about 24mpg. Note, the x-drive is about 8-10% worse mileage than the rear-drive, and mine's an x-drive.

No vehicle gets great mileage at 85-90mph. Anything over 70mph or so and the drag becomes a MUCH bigger factor. The forces increase exponentially, so a little goes a long ways...So, if you chose to break the laws of the country, you end up paying for it one way or the other. The 535i will cruise at 100mph and faster, but it will get better mileage while doing it. Save the high speeds for the don't need the V8 to cruise at 85-90.
I agree that's why this is likely to be my last V8. I'm more than happy with my GL350. I've been getting 23+ mpg for cruising over somewhere between 78 and 85, depending on the traffic flow and cops.

I'm well aware of speed and mpg relative to law of physics. My biggest complaint is the combined mpg. It is somewhere 15 to 16 mpg. If I ran into bad traffic cingestion a few times, it could run 13 mpg for the tank (I'm talking about no driving above 80 mph). If I could get consistent 19-21 mpg, I'd have been fine with it.

MJ14 535dx - Imperial Blue
MJ10 550 GT - Imperial Blue (retired)
MJ07 530i - Silver Grey (Sold)

Last edited by mason; 02-19-2013 at 09:51 AM.
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