I'm happy with the v10. Got 9.2 average mpg on my drive to Canada driving 75-80mph the whole way. I'm guessing it would have been better if Id gone 62, but that wasnt in the cards on a 2 day, 1800 mile sprint. Not spectacular, but not much worse than a comparable diesel rig either. I didn't regear, even with the 41's, so my effective gear ratio is around 3.7, which puts me at 2k rpm at 68 mph, and it still has some go left. It does work on hills, and you hear it. 3.5-4k rpm to maintain 65-70 on long grades. All said, I'd do it again. There are trade offs with the gas, and on long trips with lots of long grades, I'm aware of them. But for my purposes its a better choice.