The one thing that I do a little different than the recommended is when approaching a hill, I will slightly speed up on the approach (minimal throttle increase) and then allow my car to slow going up the hill (as little throttle as I can to make it up the hill without too much slow down). After cresting the hill I can speed back up with minimal throttle on the down side. Watch the "instant" gas mileage while you do this and you can see the advantage.
This, of course. only works with short length (rolling) hills.
I've had my 135 up around 25.6 mpg with this and all the other methods being used (non-interstate travel). It's SOOOOOOOOOO hard to drive that way in the 135. But it's a challenge to see how high you can get your average mpg.
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2008 135i SGM
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