Thanks Scott,

I'm not trying to misrepresent anything here because I would gain nothing by it. I owned a 2002 Silverado 5.3 before my Ford and I once got 21 mpg on a trip from So. Cal. to So. Colo. Normally that truck would get 17-18 on the highway and it was bone stock. All I know is when I got to where I was going I put in 18 gals. and when I got home I put in 17 gals. Nobody else drove the truck and nobody else put gas in it. Maybe it was a miracle that will never happen again. Only time will tell.

Bob

 

Sorry to see the few head biters in here Bob, yah there's always discrepancies, but if you're gonna point it out guys, be nice about it.

 

X2.

 

My uncle has a 96-97 Z71 Ext Cab, It will sometimes get 20-21 mpg interstate. Quite surprising since it has well over 200K. I think it depends on the fuel and where you purchase it. I can get better gas mileage form Cheveron than a BP. A Shell is about the same as Cheveron...sometimes. If I buy gas at a "no name" station (Kangaroo, Pilot, Raceway), good mpg is null and void.

 

I believe you with out a shadow of a doubt. I had a late production 99 Siverado 5.3, (stock) it would get 22 mpg on long trips, 17-20 around the burbs.
My Crown Vic gets 25-28 mpg on a highway trip, I have seen plenty other 4.6 vehicles do the same. dooly noted the Vic P71 only gets 9-14mpg around town though.
I am glad to see somebody get 24, it is exciting to hear. LLogic would lead me to believe that using the cruise cont. would help, seeing how the throttle opening is operating on it's own, makes sense... but on my truck I notice it wants to downshift on grades where it would not if I was footing it.
I think e-fans will be my first mod next year.