I helped someone move from the Austin area to mid-NC. He drove the rentatruck, I drove his Avalanche 4WD 350, with which he averaged about 12-14 MPG, mostly freeway. I averaged just over 20 on freeway driving, but most of that was due to my watching what the traffic was doin' far in the distance. It's amazing that people can think that the laws of physics are changed in a car.....

He's one of those "digital drivers" -- either flat on the gas or hard on the brake. And even the mighty 350 Chebby can't do much rapid acceleration in a three-ton Tonka toy. He's also convinced that the only truly valid form of auto racing is NASCAR.

Oh, well.......

But I think the answer to your question was answered previously. "A big-block 540 getting decent mileage?" Why would that be a consideration with a 540? You want an econocar, get a turbodiesel