4DRHTRD
Active Member
- Joined
- Nov 7, 2012
- Posts
- 71
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I understand that's why I said lifetimeGearing makes all the difference. If cruising speed were all that mattered, you'd have better mileage than before.
I upped the tire size on our X5 and highway cruising mileage went up 2 points. City went down 4; overall down 2. With the transmission in sport I actually get much of that back whereas before it would be worse. Gearing. That 10-speed will make a big difference - and especially so with a turbo. And you're ignoring the new engine which should give it a bump as well.
The new engine will make it worse more HP = more fuel consumption
I'm going to shoot myself in the foot and make it even worse with E85