How did you do it?? MPG bragging rights!!

well i'm getting 9 mpg, 304, 4.09 gears, close ratio t-18, 36 super swampers......how i did it, d&c lift(great), iroks and a lead foot, pretty good if you ask me.........let the greenies worry about saving the planet i just want to wheel!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

I have a 72 SII with a 304 2300 carb, close ratio 4 speed, 31 tires, 3.73 gears 4wd and I get a solid 18mpg on the highway at 70mph, about 14 in town.

 

I have a 76 Scout II, 345, Auto, 30" tires, 3.54 gears and get about 11-12 going back and forth from work. I have to drive up and down a large hill.. about 1500' difference in altitude in a very short distance.. maybe 5-10 miles OUCH!!
Without the hill I get an average of 14MPG... when I had my Rubicon, I got an average of 15MPG. The best I ever got in my J**p, was 19MPG, doing 55MPH with myself and 1 suitcase and a tailwind.

 

14.5 mpg.

Scout II, 304, TBI Fuel injection, runs like a champ, T-19, 36" IROK's, Chevy Full Width axles, lots of trail mods, Cruising at 62 mph on the freeway full of camping camping gear.

Hand calculated mileage over 400 miles.

 

19.6 MPG odo corrected

averaging 55 through a few long hills. tuned GM TBI with knock

31" Tires, 3.31 gears, t19 wide, good shape stock 345. worn out front end.

oh, and it hauls.

 

'72 with 31", 3.31, 4 speed, 1 barrel Holley, and 258 engine. I was getting 14-15 mpg with a bad vacuum advance. Put in a electronic Motorcraft dizzy from a Jeep and did the Nutter bypass. It's running super smooth now and getting just over 19 mpg at 55-60 mph.

I got a few other ideas to try and hope to raise that number a little.4

 

24-27 mpg on the highway
20-22 mpg in town
15-20 mpg towing

 

"4bt"

Cheater.

 

I regularly tick off 6-9 mpg...

1970 800, 345 FI with a stock GM TBI chip. 727 SII auto 3.73 gears, 35 12.5 x 15 Swampers, no speedo correction (40mph on speedo = 48 mph on GPS). With speedo correction, I must be around 7.2 - 9.9 mpg.

But its still too much fun, and not my Daily Driver...

 

Some people get some pretty decent figures here, better than I expected.

My 1970 800A with 232 AMC "Thriftmaster" gets about 12mpg.

The 1968 800 with 455 Oldsmobile, TH400 and 35's gets I don't care to check. I just put gas in it when it needs it, it's for fun only.

 

1980 ScoutII Diesel,
Replaced the SD33T with a Cummins 4BT
Replaced the T19 With a NV4500
Kept the 3.73 gears,
Upped the tire size to 33/10.50/15

23-28 mpg or $.16-$.13 per mile for fuel. $3.88 gal today.
I have had as high as 35 mpg if I keep is below 50 mph.

 

1968 1100 "Barn Door" 4x4 Travelall
BG 241
T-98, NP 202, 4.09 Dana 44's F/R
31x10.50s

6-8mpg in town, 10-ish on freeway at 55mph 'indicated' top speed...while driving it like a stereotypical granny in the slow lane...downhill. OPEC loves my truck!

Thirstiest engine I've ever owned. But with some time, money, and attention to math (gear ratios/rpm/tire sizing) hope to improve this situation. Might even contemplate a diesel swap.

Despite its' being a chronic gasoholic- looking at it reminds me of my dad, being a kid (with him in the IH showroom), and of happier times. Hard to put a price on that.

 

Went from 6 to 11, when I added the overdive.

 

1980 SD33T Terra, 3:54 axle, 31X10.50 tires, 4 sp transmission, air cond. on. 23 mpg at 65mph.

 

We made 20+ going 60 all day in a 1980 Nissan Diesel Scout II
It really didn't want to go much faster

 

Just updating:

Drove 476 miles over the past 5 days. Averaged 19.58 mpg. Mostly highway with a few small towns each day(4-5 stop lights/signs per town).

'72 Scout 258 engine, 4 speed, 3.31, and 31"

 

Hell of a truck motor?
Did you put it in an actual truck?
Sorry but I remember my uncle putting a Ponitac v-8 into a F-6 Ford about 1963-64 to replace the flathead. He ran it for awhile but put the flathead back in since it outperformed the Pontiac engine on 1/2 or less HP in that application. The car motor had no low end torque.

Dan

 

i know it isn't an International, but my '05 subaru wrx, stock from factory, never got above 24.3mpg regardless of what i did. turbo-back 3" exhaust, a cone style air filter to replace the stock fiasco setup, and a retune of the computer and my best to date is 32.2mpg @ 70mph, windows somewhat down. i'd say that's a hell of an increase, not bad for a high 13 second car!

 

Re: How did you do it?? MPG bragging rights!! UPDATE

1980 ScoutII Diesel,
Replaced the SD33T with a Cummins 4BT
Replaced the T19 With a NV4500
Kept the 3.73 gears,
Upped the tire size to 33/10.50/15

Camping trip up to the Chirichaua mountains, Scout was loaded somewhat, did not spare the throttle. 70-75 mph, averaged 20.78 mpg for the trip.