CK5
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Holy sh*t! 14mpg!

My 03 1500 4wd 5.3 only gets 15mpg in town.

I had a 2013 GMC Sierra Crew Cab on 35s - Z-92 and it got 19mpg and I DD it 65miles each way. Even with 19mpg... it took me 8-9 gallons a day for work then after hours kids sports. got rid of it after almost 3 years...

I have a Honda for gas mileage.
at least you don't get made fun of... hah.. I drive a cough.. cough.. priu... cough cough... sssss....
got 68mpg on way to work @ 60mph and dropped it to 57mpg on way home @80mph

highest ever was 71.8

I have you all beat. My K5 has stretched a single tank of gas as long as 6 months.

try 1997-2004 !!!!! I got 7 years out of a half tank!!!! :haha:
 
9 mpg.
1975 K5 with a 400 small block, turbo 350 trans, 3.08 gears and 31's
Gets 9 towing.
Gets 9 empty.
Just gets 9 no matter what.
 
90 burb tbi 454 on 40s 5.13 with OD does about 12 on the highway, work it all day in the snow, and it will get as low as 8
90 burb tbi 350 235/85 16 and 4.11s with a 700 averages about 11, usually 13-15 on the highway
95 burb 6.5 stock 2500 with 4.11s averages 14-15 and 17-18 highway at 65-70
 
Yeah, not driving is the ultimate fuel economy. No technology or driving style can compete.

Once I did the math for a coworker that my K5 burned less gas and polluted less than his Hyundai (based on 2.5-mile commute vs 30+), which made for the oddest stare. "But.....But.....". It's like that conversation where you explain your big rig is green since it's a bunch of recycled parts, while manufacturing a new hybrid causes a lot of pollution. "But...no....uh...."

Mind blown.PNG
 
Just got back from our annual desert trip. 91 K5, 5.3/700r4/4.10's with the FWC camper, two full size dudes and gear for 7 days including a huge snowmaster fridge. Total weight estimated to be 6500 lbs. Trip average just a tick under 12 mpg (on/off road). Last tank on the way home yesterday 14 mpg over 240 miles in the mountains. I don't know how I pulled that off.
 
My m1009 aka 1986 K5 blazer, gets 17 to 18 mpg.
33's
3.73.
Turbo 400.
6.2 diesel n/a
That is between 4,000 and 9,100 feet elevation.
But unloaded.
I try not to tow with that one.

It had 3.08's and 31's when i got it and made 20 mpg on the trip home from Oregon to Wyoming.
Not bad for a leaking injector pump.

All better now though.
I'll take 18 mpg all day.

I dig the 6.2.
 
I had an 87 burb, 2wd, 6.2, 700r4, 3.73s, 31" tires. It got 24 regularly on the interstate, cruise set at 68-70. And I had a couple 2 lane runs, out and back total of 4 hrs drive time that I got 27 overall both times. I SO miss that truck. Rust free and all :doah:.... Sold it to a buddy for $800 and he promptly traded it for meth making supplies..... Had I even know he was into that at the time he wouldn't have even been a buddy
 
I had an 87 burb, 2wd, 6.2, 700r4, 3.73s, 31" tires. It got 24 regularly on the interstate, cruise set at 68-70. And I had a couple 2 lane runs, out and back total of 4 hrs drive time that I got 27 overall both times. I SO miss that truck. Rust free and all :doah:.... Sold it to a buddy for $800 and he promptly traded it for meth making supplies..... Had I even know he was into that at the time he wouldn't have even been a buddy
Ouch.

Worst sale i ever made was a 1969 International Harvester pickup, pristine, 60,000 miles on it, 304 v8.
Thing rode like a Cadillac with that torsion bar front susension the 2wd's had.
Had a Pertronix ignitor and 2 inch dual exhaust with an H pipe i put on it.
Sweetest sounding truck ever.
Nothing sounds like the click of a rust free IH door shutting either.
Everyone thought it was gray until i waxed the oxidation away.. eggplant purple with faux wood panel decals.
Sounds atrocious but looked sweet on that truck.

Sold it to a guy that stacked it into a semi 3 days later.

Only thing that saved his life was the heavy gauge steel they made those Cornbinders outta.
Damn I miss that truck.
 
There was a 1972 IHC 1600 series pickup with the long wheelbase at the junkyard ,that they dragged out of the "line up" and decided to made a crude flatbed for it out of two shorter ones off other pickups that were diamond plated..they added a winch and made some tilt down ramps for it ,and used it to haul junkers in with..

It had a 392 V8 and a 5 speed,I think it was factory,nothing looked hacked,like the floor where the shifter came thru it,and it was geared pretty low,about 60 mph was it for top speed on a highway,revving at 3600 rpms..

The truck came from TX originally,how it ended up here was a mystery,I guess whoever owned it decided to junk it despite it being very rust free and solid,and less than 100K on it too--it was at the junkyard when it was bought by a new owner,and when he found titles to many of the vehicles there,he started picking out the better ones and did restorations on them..this truck was unmolested inside and had a nice seat & dash too,all original..he was pleased when he found it had a good title ..

That truck went right along,and first gear was granny low,the thing would lift the front wheels up if you dumped the clutch too fast!..it hauled cars better than an 1970 F-350 with a beaver tail and that truck was the one the drivers preferred to haul cars in with,especially if they were not close by,it had much better handling & better tires..

The boss once took it to VA to pick up an old car he needed for parts,said it not only made it there and back,it actually wasn't that uncomfortable to drive all that distance...he did say he had to stop at an ATM to get more money for gas though,it liked to guzzle!..
 
There was a 1972 IHC 1600 series pickup with the long wheelbase at the junkyard ,that they dragged out of the "line up" and decided to made a crude flatbed for it out of two shorter ones off other pickups that were diamond plated..they added a winch and made some tilt down ramps for it ,and used it to haul junkers in with..

It had a 392 V8 and a 5 speed,I think it was factory,nothing looked hacked,like the floor where the shifter came thru it,and it was geared pretty low,about 60 mph was it for top speed on a highway,revving at 3600 rpms..

The truck came from TX originally,how it ended up here was a mystery,I guess whoever owned it decided to junk it despite it being very rust free and solid,and less than 100K on it too--it was at the junkyard when it was bought by a new owner,and when he found titles to many of the vehicles there,he started picking out the better ones and did restorations on them..this truck was unmolested inside and had a nice seat & dash too,all original..he was pleased when he found it had a good title ..

That truck went right along,and first gear was granny low,the thing would lift the front wheels up if you dumped the clutch too fast!..it hauled cars better than an 1970 F-350 with a beaver tail and that truck was the one the drivers preferred to haul cars in with,especially if they were not close by,it had much better handling & better tires..

The boss once took it to VA to pick up an old car he needed for parts,said it not only made it there and back,it actually wasn't that uncomfortable to drive all that distance...he did say he had to stop at an ATM to get more money for gas though,it liked to guzzle!..
The only 2 motors that IH used that got any better than 13 mpg were the 152 IH 4 banger which was exactly 1/2 of their 304 v8, and the AMC 258 inline 6 they used in the mid 70's.
Actually, they had a smaller v8, the 260 i think, but i had no experience with it.
But the 304, 345, and 392 got poor fuel economy.
Made a lot of low end torque.
Lasted into the many 100's of thousands of miles.
Timed beginning on #8 top dead center.
Used timing gears instead of a chain.
And had a thermostat bypass tube the size of most modern radiator inlets today.
That little 152 was actually the casting of the 304 with a bank of cylinders missing.
A fine little motor in the Scout 800's.

But we digress.
Back to Chevys.
This is CK5 afterall.
 
My m1009 aka 1986 K5 blazer, gets 17 to 18 mpg.
33's
3.73.
Turbo 400.
6.2 diesel n/a
That is between 4,000 and 9,100 feet elevation.
But unloaded.
I try not to tow with that one.

It had 3.08's and 31's when i got it and made 20 mpg on the trip home from Oregon to Wyoming.
Not bad for a leaking injector pump.

All better now though.
I'll take 18 mpg all day.

I dig the 6.2.

Close to my M1009, 3.73s on 31s at 1500' elevation. With the NV4500 it's a 20MPG rig. I'm still disappointed as the stepside rarely gets that low. I think Gus is right about the aerodynamics hurting burbs & blazers worse than the trucks.
 
The early 80s Chevy van had a 6.2 option. They got 30mpg. So I'm not sure if the burb aero Dynamics hurt or what it is...?
 
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