Quote:
Originally Posted by quagmire
That's 2 MPG better than the EPA's highway estimate. Considering at 80 MPH+ there is a lot of drag on the car compared to 55-60 MPH, I would say that's pretty good.
Of course the only way to truly be accurate is to do the calculations manually.
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^ What he said. EPA highway is 20 MPG. Almost all cars can beat their EPA highway estimate on a long, steady cruise, but usually not at 80+ MPH. At 55 MPH you could probably get 25 MPG-ish. Drag increases exponentially with an increase in speed.
I routinely go to a lake cabin in the summer that is 260 miles round trip. If I go 55 MPH my 318ti will do about 36 MPG. If I do 75 MPH it will drop to about 31-32 MPG.