Soon

Got the mpg calculation on every tank of gas since 5/23/80 til today on my little truck. The lowest has been 13 mpg and the best 23 mpg. Still totally stock. The window sticker that came on the truck says the estimated mpg is 18 and that's exactly what I'm getting 30 years later.

martinfan30

The key is port matching the manifolds to the gaskets.

I got 23 mpg (city/hiway average) with my 82 22R. Mid-range TRD cam, TRD headers, Aisin carb jetted, 36" swampers (5:29's) with frt/rr lockers. 4 speed.

camo31_10.50

hey Soon.

i ENVY your meticulous logging method..lol..wish i could do something like that.

i like how you were able to keep the yota stock though

Champ

Probably around 12, but thats not bad with the mods and extra weight. Oh and a slightly female tempered carb that likes to act out sometimes!!!

BoredOutnJackdUp

83 with 22r with cam heads header weber and pistons, the works with 35x12.50 bfg muds stock gears (for now) and get 19 freeway about 16 in town

jaymaican

I bought my '83 last summer and befor you call BS on this, I ran the tank dry three times!

You guys might need to do some number crunching too, I have no clue how to work it out.

Stock 22R holly carb running on 35" Cooper discoveries stock 50L tank stock and I constantly got 600km (give or take 15) that would be MORE distance with the 35" tires correct? So whatever that would work out to... Any math teachers out there? :p

Nimyad

i just went on about a 400 mile road trip. on 35's with 5.29's i got 20 mpg

82Hackle

New here today, and this is my very first post. I have an 82 4x4, 22r, all stock except for 31x10.5's and I'm a real MPG fanatic. I use a Garmin NUVI 1450 GPS for speedo and gas mileage calculations. Over the past 300+ gallons of fuel used, I've averaged 21.43 MPG. The Garmin makes calculations based on actual fuel used and mileage calculate by the GPS unit rather than using odometer readings.

81YOTABOY

81 4x4 weber carb, hooker header, 4in lift 14-15mpg city/highway mix

redneckcustoms13

in my 80 with 4.37 gear a 32" tires average 17 with mixed driving.
in the 83 2wd average 24 with mixed driving.

fredbauer

81 4X4 longbed stock tires weber 32/36 headers RV cam 21.3 mpg

traveljoe

For everyone who isn't sure how to compute the difference in mileage for larger tires, here's how it works:
Larger tires mean you are traveling faster than your speedometer says, unless you have re-geared to compensate for this. Either way, you need to figure out the difference between your speedometer reading and your actual speed. You can use the speedometer on a GPS while driving, or drive by one of those radar speed signs near schools or dangerous corners. The faster you are driving, the more accurate your ratio will be (unless you're in a school zone!) Note what your speedometer says compared to the GPS or radar sign. Be as accurate as possible.
Then divide the GPS or radar speed by the speed on your speedometer. This will likely be a number larger than 1, unless you have re-geared. Calculate this number to a few significant figures (1.13 or 1.25 etc.). This is how many times faster you are actually driving and how many times farther you are actually driving than your gauges read.
Next, multiply that number by the speed on your speedometer or the reading on your odometer between fill-ups. This will give you your actual speed at any point on the gauge or actual mileage between fill-ups, respectively. Hopefully, you can also be less nervous about getting pulled over for speeding now too.
From here, just divide your new, accurate mileage between fill-ups by the amount of gallons and you've got your actual mileage.

skibum11

ya i don't understand how people are getting 20 or better! i would be lucky to get 15. and its 90% highway. stock gearing and 32's with 22r. but i just got the truck, is there anything i could do to improve the fuel economy? its got a holley 350 carb.

traveljoe

I routinely get 18-23 mpg. I'd say your Holley carb is causing your gas mileage issues. Does it give you much of a power increase? It's probably dumping a lot more gas in than a stock carb. Other than that, making sure your tire pressure is high enough will definitely make a difference. I keep mine at at least 35 psi- sometimes 40. If your tire pressure is low this will create a lot of rolling resistance. It can be enough to make a 2-4 mpg difference if you increase the pressure. How you drive makes a big difference too. Fast starts and stops will kill your mileage and your brakes.

Does the truck have any other issues, noises, etc. These could be contributing factors as well. I hope this helps.

skibum11

Well I just got the truck not that long ago and the Holley was already on it. So I don't know how it really affected the performance. Should I replace it with a weber? I think it idols a little fast to but I don't know anything about carbs.

As far as tire pressure goes, I always keep my tire pressure at max PSI.

Now for other issues or noises. I have never owned a 22r so I have no idea what they are supposed to sound like. There is no muffler so it doesn't sound great. I can hear a ticking under the hood? I don't think its a rod cause its not loud. You can only really hear it at idol.

I just know it doesn't get good gas milage and I want to improve it because its my DD. I would be happy with 18 to 23. But I bet it gets around 10 in town.

traveljoe

I would switch out the carb for a weber if you are looking for mileage and it's a daily driver. I just have a stock carb, so I would ask around to see what the switch should do for your mileage. I've been told that not enough back pressure can reduce gas mileage, so you may want to put a muffler on it. Do you know if any work was done to the engine by the previous owner? LC Engineering makes a host of components that would increase power and reduce gas mileage. If he put a hotter cam in it, that would give you worse mileage and more power. A good way to tell if you have more power now is hills. If your truck doesn't have a problem with hills at all, you definitely have more power than stock.

I have a slight tick under my hood too. It has stayed the same since I got the truck a couple of years a go, so I wouldn't worry about that. Just keep an ear on it. You should check all of your trans, transfer case, and diff oil. It may need to be changed. Also grease all your U-joints and steering knuckles. You'll need to make a zirc fitting adapter for the knuckles and for a couple of the U-joints you'll need a long, needle-like attachment for the grease gun. When I got my truck the steering knuckles hadn't been greased in ages. Both of them together took over two entire tubes of grease. If there is too much friction in drive line parts that will eat gas, but not as much as other things in most cases.

I hope all this helps. Keep us all updated.

BigBird82

I get like 15 or 16 once in my life i have gotten 20 somehow ...and didnt drive it any different haha but mostly 15 ish definitely needs to go up though lol

skibum11

Do you have any mods done to it? Performance, suspension, tires?

imspidey

15 to 20...mostly driving 3 miles to and from work until I can get some work finished up on the rig!

INFINITY

as low as 11 on trail and high as 19 on the highway