I just checked mine for the first time. 11.78 miles per gallon. Take that Al Gore!!!

 

Just checked it again, with corrections for a 10% speedometer/odometer error I got 13.8 Avg. Not great but not bad considering I beat on it quite a bit on the last tank. Started out last October gettin' 7-1/2.

1986 D150/727/2.94's with 235/75-15 BFG All Terrains on back
Bored .020" with flat tops
stock cam
Edelbrock SP2P
QuadraJet off a '93 W150 318 4 speed
Summit 1-5/8" full length headers with 3" pipes off the collectors into a 3" single exhaust.

 

1987 Dodge Ram D100
Slant Six (225cu)
All Stock
City 12-14mpg Freeway/Highway 17-19mpg ( all depends on how hard I drive it )

oil change every Three Thousand Miles, cleaning and other basic maintenance

 

8.89 .........miles per gallon. 318 with a three speed automatic transmission. OMG that sucks!

 

Hey y'all!

I drive a 1991.5 D350 CTD with the Getrag 5-speed and average 16mpg around town and 19.5mpg on the highway keeping 70mph with about 6-8lbs of boost cruising. Of course my truck does have some performance mods so I'm happy with what I get!

 

'77 D150 318 1 bbl with auto lucky to 12 on the highway and 8-10 in town !

 

About 7 miles to the gallon

360/4 speed manual with granny gear. Holley 650 and Edelbrock intake manifold , headers , and half of an AC pully on 33's with 4:10 rears .

 

1987 D100
3 speed Auto
Slant Six ( 225 )

I've recently straight piped it, and removed the emissions pump, and also bought a tonneau cover for it, I've calculated over 5 full tank fill ups, I'm now at 20mpg.

I've gained around 6mpgs from straight piping, removal of emissions pump, and tonneau cover. WELL WORTH IT.

 

i get about 7-8 combined driving, too bad that means about 11miles of highway a day and no town lol. i have a 90 318 w/360 heads and a cam.

 

Just done mine. 1988 dodge ram 4x4...18.2 mpgs on the highway 14.2 in town.

Truck runs 14.4 @ 94 in the 1/4 mile, has 360 crank HP

headers, intake 3.90 gears, 5.7L LS1 with a 4l60e