[Debonair]

I've been looking at engines to swap into the truck and the one that i was settled on was the 4.8L V8. I have since chosen for the engine to be the 5.3L V8 for the sole reason of Active Fuel Management. The 4.8L and 5.3L have essentially the same EPA ratings, but the AFM is only offered in the 5.3L and larger engines.

So I did some math and if this 5.3L came in my truck with a 4 speed automatic the EPA estimate would be about 18.7 MPG City.

Thats almost 2 MPG better than my 4.3L V6 and over 100 more horsepower (and sounds a lot better)

I plan on swapping in a 6 Speed manual and driving the way I've learned on here. From that, i could easily match my economy but plan on beating it.

Until the engine in it now goes, or i finished everything else i want to do with the truck, i'll just be saving and aiming for better numbers with what i have now