"The 1st gens are the mileage kings, and the newer trucks fall more or less linearly behind them due to the increases in stock horsepower over the years. "
I've had both - a '91, and the current '02 - and in my case at least, NO comparison in obtainable MPG or power - best I could do with the '91 was typically 21 MPG - I can easily get 24 MPG with the '02 driving the new truck at the same speed over the same route - and when I choose to stab the go pedal, again, no comparison. Another evidence of the more efficient operation of the new truck, is thaat the oil stays FAR cleaner FAR longer thaan the '91 - less soot from inefficient combustion. The old truck was great, and I loved it - but for economy, power and overall comfort and efficiency, it's the '02, hands down!