Anybody owned their 80 since it was new and can remember what the fuel consumption was when it had low mileage?
Solid 19.5 mpg. Am I doing something wrong? (1 Viewer)
- Thread starter NerdNoise
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
I got 19 mpg three times on my trip picking my rig up in Santa Clarita, CA. Drove across I-40 back to Atlanta. Now first 19 MPG was leaving flagstaff going downhill to Albuquerque, NM. Then Albuquerque to El Paso, with a constant nerve racking 30 MPH tail wind pushing me. Then the final 19 was El Paso to to OK City, again another wicked tail wind.
Since being in Atlanta, I get 16 average. I also tell my wife to run over every whining Prius driver that says I am killing the environment. Just glad I can go places where there is no TARMAC
Since being in Atlanta, I get 16 average. I also tell my wife to run over every whining Prius driver that says I am killing the environment. Just glad I can go places where there is no TARMAC
I'm glad I have my 80 and I love parking it in the reserved hybrid spot at Ikea. I even park it with one wheel on the parking block. It makes me feel warm inside knowing I'm parking my 11 mpg 7 seater in their precious hybrid spot. Good thing I don't have one of those freak 80's that gets more than 14 (lol) or it wouldn't make me feel so good.
I've seen 18mpg on highway before. Then I put in a S/C and changed to 10k cst fan clutch fluid... stays cool but no more 18!
I had 19mpg twice on one trip down to Hanksville Utah and back. That was with my 93 that had 225K miles on the motor. My 97 with way better compression and 160k miles can't crack 15mpg. We just did 1400 miles a few weekends ago through the Utah, Arizona, Colorado and New Mexico and barely got over 14mpg. Like Dan said, "Don't touch anything". In fact I would stop driving it. That way you can tell people forever that your last fill up got you 19mpg.
What Kills me is that my 30' Tioga Motorhome with a bigblock ford motor can get 10mpg if I baby it. You would think our cruisers would do a little better.
What Kills me is that my 30' Tioga Motorhome with a bigblock ford motor can get 10mpg if I baby it. You would think our cruisers would do a little better.
I think 19 is doable with a well tuned truck. The most I have got is 17.4 mpg via scangauge and corrected by gps. That was on the freeway with stock gears, 315's, S/C, bumper, sliders, unloaded. I consistenly get 15-16 on my 15 mile one way daily commute: mixed highway/small town (very minor OH hills). Around town I'm usually between 11-12.5.
I recently pulled the front driveline and locked the CDL, so that might help increase the mileage. We'll have to see.
I recently pulled the front driveline and locked the CDL, so that might help increase the mileage. We'll have to see.
Grench
SILVER Star
What size, brand and style of tire are you running? It is time for a set of tires on my wife's truck.
justbecause
perpetually lost.
im considering buying that 95 80 thats forsale right now in the classifides section w/an ARB and 375k miles do i have a snow balls chance in hell of seeing #s like 19mpg?? and can i expect the rig to make it to 400k? what kind of work should i be ready to do on something w/that many miles??
- Thread starter
- #70
BFG Rugged Trail T/A 265/75/16. Next tires though, I'm going for tall and skinny pizza cutters. Those seem to have more benefits over the flotation tires. There is lots of good reading out there about that.
- Thread starter
- #71
With something with that many miles on the clock I would think that you could get 45mpg or better. everything should be so loose under the hood and the chassis by now. I hope that you are not planning on paying over $1500 for it. There are so many good deals to be had out there right now. Don't feel pressured, keep shopping.
Grench
SILVER Star
19.8 actually
Well, that makes your high MPG even more strange. Those tires are 1/2" larger than stock 275/70R16. You are traveling more miles than your Odometer is telling you.
275/70R16 is 31.2" dia * pi = 98.0" per revolution
265/75R16 is 31.7" dia * pi = 99.6" per revolution
Not a huge difference though. Instead of traveling 195 miles on 10 gallons, you have actually traveled 198.2.
Good luck finding tall and skinny tires in anything but Interco's stuff. They're fine if you like trail treads that don't like pavement. For whatever reason, nobody seems to be making 255/85R16 or 9.0R16 for the US market anymore.
Well, that makes your high MPG even more strange. Those tires are 1/2" larger than stock 275/70R16. You are traveling more miles than your Odometer is telling you.
275/70R16 is 31.2" dia * pi = 98.0" per revolution
265/75R16 is 31.7" dia * pi = 99.6" per revolution
Not a huge difference though. Instead of traveling 195 miles on 10 gallons, you have actually traveled 198.2.
Good luck finding tall and skinny tires in anything but Interco's stuff. They're fine if you like trail treads that don't like pavement. For whatever reason, nobody seems to be making 255/85R16 or 9.0R16 for the US market anymore.
Higher mileage could always be due to running lean for whatever reason, vacuum leaks, fuel filter/injectors not flowing properly, etc...
denis
(O) toyota nut (O)
Who drives a turbo diesel at 100 km/h on the freeway?
Me
on the last fillup with "the bear" I did ~9.2L/100km or 25.6mpgus but the driving conditions were better than my average
Once upon a time my 80 got ~18mpg...once...on a road trip...when it was completely stock...downhill...with a tailwind.
So back to the original question: "Am I doing something wrong?" Yes. Yes you are. You are not buying and bolting on a front bumper, you are not driving around with a winch in said bumper, you are not adding sliders, you are not adding lift and big tires, you are not driving around with a truck full of tools and camping gear, you are not driving around with a 2nd battery, you are not driving around with a truck full of spare parts and fluids...etc. etc.
So back to the original question: "Am I doing something wrong?" Yes. Yes you are. You are not buying and bolting on a front bumper, you are not driving around with a winch in said bumper, you are not adding sliders, you are not adding lift and big tires, you are not driving around with a truck full of tools and camping gear, you are not driving around with a 2nd battery, you are not driving around with a truck full of spare parts and fluids...etc. etc.
My 1996, with almost 220,000 miles returned 19.4 on the drive out to the beach! Just under 200 miles, used under 10 gallons. I had to double check, the gas pump.
Around town I average 14.3. But, I was really surprised by the 19 mpg!
As some others state above, I am now afraid to change anything, even the parts that need replacement.
Around town I average 14.3. But, I was really surprised by the 19 mpg!
As some others state above, I am now afraid to change anything, even the parts that need replacement.
I had been getting great gas mileage for some time and then one day it threw a front O2 sensor code.
After the repair the truck drove much better with more power and the gas mileage dropped significantly.
I'm sure the sensor had the engine running lean and it was why the great MPGs.
If it's been a while since the O2s have been changed I would consider doing it as a lean condition will cost you more in the long run.
After the repair the truck drove much better with more power and the gas mileage dropped significantly.
I'm sure the sensor had the engine running lean and it was why the great MPGs.
If it's been a while since the O2s have been changed I would consider doing it as a lean condition will cost you more in the long run.
Interesting. I suppose if the sensor is almost worn out, but not enough to throw a code, it might cause a lean condition. I don't have anything to compare to on mine as the O2 bank one code came on 50 miles after I bought mine at 120K. The mileage definitely sucked with the completely blown sensor and I gained about 3 MPG by replacing both with new OEM ones from CDan.
I agree, its probably not a bad idea to change the O2 sensors if they are original and you have over 100K miles. These are consumable sensors that have a finite life.
19.2 mpg
My best tank has been 19.2 mpg, going to yellowstone. wife 3 kids, camping gear. 93 234k 265/70/16 (yes undersize tires seem like a sin no matter how slight, thanks p.o.). Also helping with the mileage is filling up when at the half tank mark, rather than running toward empty. I have done as low as 12 in the city letting the tank run dry though, but get 16 mpg going 80 mph on road trips.
My best tank has been 19.2 mpg, going to yellowstone. wife 3 kids, camping gear. 93 234k 265/70/16 (yes undersize tires seem like a sin no matter how slight, thanks p.o.). Also helping with the mileage is filling up when at the half tank mark, rather than running toward empty. I have done as low as 12 in the city letting the tank run dry though, but get 16 mpg going 80 mph on road trips.
Last edited:
Skrewball
TLCA#18502
my best is 12 on the highway and 8 around town.......
