CK5
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K5 Blazer gas mileage thread
- Thread starter 83BlazerSM465
- Start date
Lol
I doubt anyone is questioning my 11mpg.
It’s not good enough to question.
100mph however...
I doubt anyone is questioning my 11mpg.
It’s not good enough to question.
100mph however...
Mine could get 100 mpg, downhill with a tailwind and a sail the size of a football field.
Fact is fuel economy is infinitely variable. Terrain, wind and the nut behind the wheel. Add to the variables of different engine/trans combos, tire size and gear ratios making a clear apples to apples comparison is impossible.
Fact is fuel economy is infinitely variable. Terrain, wind and the nut behind the wheel. Add to the variables of different engine/trans combos, tire size and gear ratios making a clear apples to apples comparison is impossible.
Bone stock 1990,268000 miles,generally get about 13 on the road,11.5 regular every day travel
Williebeaman
1/2 ton status
Stock 350 tbi I get 9-10 mpg roughly. The price we pay for lookin cool 
Something not right.Stock 350 tbi I get 9-10 mpg roughly. The price we pay for lookin cool
You should be getting 12-14
bsgreen
1/2 ton status
Last time my truck was in one piece I got 13-15 with stock 305/sm465/3.73 gears and 33" tires. Mostly kept it at 65 mph and under.
Nowadays it gets either 0 mpg or infinity mpg depending on whether your a glass half empty or half full kinda guy.
Nowadays it gets either 0 mpg or infinity mpg depending on whether your a glass half empty or half full kinda guy.
Williebeaman
1/2 ton status
For a worn out old 350 on 33’s with a big ol front brush guard?
What gear ratio?
I pulled 17MPG out of a 305 and two different 350's (carbed and injected, 465 or 700R4, NP208 or NP205, 3.08 or 3.42, and 31 or 33"), but those were under pretty ideal conditions. Mostly city, any sort of offroad use, 10MPG I'd consider pretty normal.
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That is actually called "undefined" in math terms since you cannot divide by zero.
bp71k5
3/4 ton status
For what it’s worth. With a 454 TBI motor, 4.56 gears, and 37” tires, I was getting ~8.5mpg around town in CA. On the road trip out east, I got ~11mpg on just highway miles. Once I got out of CA, it climbed to a little over 13mpg highway. This is with the lean cruise stuff turned on in the ECM. Evidently the CA “special” gas eats up a lot of mileage compared to normal gas. I haven’t checked mileage around town on “non-CA” gas yet.
Williebeaman
1/2 ton status
Not sure, I’m a noob when it comes to these trucks I just got mine back in January so I’m still learning how to work on it. I guess I should also say all my driving is in Austin stop and go traffic.
Oh ok.
Yeah if you don't have any highway miles in the mix you can't get above 10mpg
My K5 is still pretty much stock. Quadrajet on a 305, 700r4, 3.73 gears and 31's with no lift. Still have the air dam, and the bug deflector my grandfather installed when he bought the truck new in '84.
I usually think I'm doing pretty good to get double digit mpg around town. 7 to 9 is more common than 10-11, but I also cane the shit out of that 305 to get it moving at an acceptable pace. I'd probably see the 10-11 more often if my right foot wasn't so heavy, or if I ran with AC on less frequently.
On the highway, 17 is pretty common, but I almost never see better than 18, except for one freak incident driving through Rocky Mountain National Park where I somehow got 21 mpg.
I usually think I'm doing pretty good to get double digit mpg around town. 7 to 9 is more common than 10-11, but I also cane the shit out of that 305 to get it moving at an acceptable pace. I'd probably see the 10-11 more often if my right foot wasn't so heavy, or if I ran with AC on less frequently.
On the highway, 17 is pretty common, but I almost never see better than 18, except for one freak incident driving through Rocky Mountain National Park where I somehow got 21 mpg.
'78 stock '89 tbi, 700r4, 3.73's, 33's. Loaded for Moab, with 3 people and luggage, 70mph on Interstate, 15.5mpg. Average for Poison spyder trail, and trip home 13mpg.
