Car was actually more fun the first trip. During the second trip I didn't drive it at WOT enough to feel the benefit of the larger cam, but I did notice the lower quality driveability at lower rpm and idle. Not much, but better ride in first and second gear through parking lots and crowded streets stop and go with the smaller cam. I ran my car up island a dozen or so times with the 230/236 cam and the MPG averaged out to around 24 in the 1300 or so miles. I've had the car up there with the 236/245 cam a couple times but didn't record the mileage, only on the 3000 mile trip over the Rockies. Like I said not a laboratory experiment but that's about a14% drop.