- Thread starter
- #41
How fast were you going? We’re you on the interstate?
Just curious, What is your MPG on you're FJ40?
- Thread starter Jackson Hanes
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
What's above 70? 
After reading this entire thread I’ve come to the conclusion that FJ40’s seem to be hot rods in France. I’d be white knuckled and terrified long before I approached 80 MPH in my stock rig.
Ignorance is bliss
POPO AGIE
SILVER Star
I use to get mine up to 80 once in a while.
- Joined
- Apr 2, 2014
- Threads
- 9
- Messages
- 601
lol
My 1972 fj40 with A/C , 33x10.5 front 33x12.5 rear at sea level all flat land, stop and go in town and 55 hwy. Is 14 mpg. 1-f engine and 15/40 engine oil.
POPO AGIE
SILVER Star
I got 10 mpg most of the time with my 78 with either the 2F and 155F motors.
My 45 gets 19-22 on the hwy.
My Carbureted (Quadrajet), 350 converted FJ40 (stock 4-speed, 4.11 gears) originally got about 10 city, 13-14 highway, averaging out to about 12mpg on long drives holding 40-65mph most of the time with a little stop and go. 55ish always seemed to be the sweet spot for mileage. Any faster, you’re fighting wind resistance.
This year heading to and from Fall Crawl with a new intake, I was at about 10mpg flat, but was also, I learned, running on 7 cylinders… TBD if actually fixing my junk will improve that.
This year heading to and from Fall Crawl with a new intake, I was at about 10mpg flat, but was also, I learned, running on 7 cylinders… TBD if actually fixing my junk will improve that.
My '75 with F.I. 350 V-8, NV4500 5 speed, 33" Toyo M-55s and 4.11s (I think) can get 15 mpg at 65 mph (but not always). 12-13 mpg in town.
Way back in 1976, my all original 1972 with 1F and 3 speed got 18 mpg through Nevada on Hwy 50 on its maiden voyage out West. I think fuel was WAY better back then.
Way back in 1976, my all original 1972 with 1F and 3 speed got 18 mpg through Nevada on Hwy 50 on its maiden voyage out West. I think fuel was WAY better back then.
I run about the same setup except 33" maxis rzrs and a Qjet carb with a mild cam, and my numbers are similar.
Yeah, ... I've noticed both your 40s are similar to ours. I always watch for your posts (so I can learn somethin')
I do run nuthin' but non-ethanol, 87 octane in the '75. '72 with the Ramjet gets the good stuff, 91 octane or better.
I run crap gas, 87 octane w/ethanol. Some of the places i wheel, the gas stations only have 1 choice, which is crap gas. I made a decision a long time ago to build and tune the engine the best I can and be able to run crap gas.
Come to Maryland and tune my Qjet so I can get 15mpg!
Thanks for the invite. What's for dinner?
I think our setups are apples and oranges. The nv4500 has a 27% reduction in 5th gear. I also chose my words carefully, my numbers were "similar"
. My highway mpg's in the 40's current setup, at about 80% highway and trying not to exceed 65mph and that results in the high 14's. In the past I was more performance minded and was never concerned about mpg's, but with high dollar gas and a 60 mile round trip to work and a "want" to drive my 40, I decided to figure out how to tune for better mileage. My 1st adjustments were not with the carb, but was timing related which increased mpg's the most so far. Im just starting to deal with the internals of the carb. When I pulled this 40 out of storage, my goal was to get 15+ mpg. I still gotta ways to go. I'll be glad to help when I can.
Last edited:
1975, 2F, 3.7s, Megasquirt (AFR-tuned), desmogged, FAST optical ign w/ stock dizzy, stock size tires, never driven on the highway or over 60 mph, all surface-street, city-type driving.
Over the last 20 years or so, never less than 9 mpg or more than 10.5 mpg. And that was true more than 20 years ago, too, when it was all stock (carb, smogged, points, etc.). They're just heavy, wind-catching beasts . . .
Over the last 20 years or so, never less than 9 mpg or more than 10.5 mpg. And that was true more than 20 years ago, too, when it was all stock (carb, smogged, points, etc.). They're just heavy, wind-catching beasts . . .
All about smiles per gal!!!!
I drive it gets empty i fill back up all i have ever worries about.
Only time i checked was when i bought it and drove 1100 miles home in it. Saw 21mpg in the 3B
I drive it gets empty i fill back up all i have ever worries about.
Only time i checked was when i bought it and drove 1100 miles home in it. Saw 21mpg in the 3B