I hit 57 mpg today. Down hill w/ a tail wind.

 

and for more reference... when I had my 285's on my 2000 the error was 8.7%, with the 295's it went up to 9.3% and the 295s were a 33.4" tire so you may actually be farther off than you think.

http://www.differentials.com/calc.html

have a look at this site's calculator...

 

I can actualy get mine to read 99.9. down hill, at a good speed, push the clutch in and let off the throttle

 

Currently 20.9 around town (gently).

1999 CTD 24 V (stock)
4x4
Automatic w/OD
MRBP full 4" exhaust
Drew's MMO & Power Service mix

 

I have a 2002 stock rig, 35,000 miles
no addatives
auto tranny
4.10 rear end
4x4

I was getting 18. mpg average before my lift pump went. After the dealer installed the replacement now I'm averaging about 16! Anyone else lose mileage after pump replacement? I never calculate my mileage by hand, I only use the trucks computer, I wonder what some of you see as far as difference between what the truck calculates and by hand.

 

I'm curious too mbaz. What difference are y'all seeing between hand calc. and the computer. I just bought mine '06 4X4 2500. Everything on it is stock. I have about 2000 mi. I've been using about 8-10 oz. of PS white bottle in it. I'm getting about 14 or so on the computer. Most of my driving is 60%city\40%highway right now.

 

Cbass520,

In the summer time use the Gray bottle it gives a higher boost to your fuel, the White is for Winter[X(] use and the Red []is for when your filter is gelled up and fuel will not flow[:@].

Charles

 

when I changed the fuel pump on my gasser, mileage droped about 1 mpg. I figured the old pump was not providing the pressure the new pump was. It ran way more consistant with the new pump.

 

Good 'ole Georgia Ovedrive!

 

he he he [sm=signs007.gif]