The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1967 - 1972 Chevrolet & GMC Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=3)
-   -   What's your MPG? (https://67-72chevytrucks.com/vboard/showthread.php?t=799984)

Montierth 01-22-2020 09:04 PM

What's your MPG?
 
Just for fun what's you MPG and specs?

I have a crate 350 SBC, 4 barrel Edelbrock with headers and turbo 350 tranny. Today I calculated 11.9 MPG on mine. I guess it could be worse so not bad.

Steeveedee 01-22-2020 09:41 PM

Re: What's your MPG?
 
As in my sig, including that cabover camper shell, 10 MPG in combined driving. I'll get a chance to recheck the mileage pulling the (6000 pound) travel trailer in a few weeks. It used to get 7, but I discovered a popped diaphragm on the vacuum advance, so we shall see. I also went to non-ported vacuum advance. It won't make any difference on a pull, but should help some at cruise. That 7 MPG was three years ago driving the 118/405/5/14/etc to Randsburg, CA. Lots of long grades going there, and had some cooling problems. The truck suffered. The cooling problem is well and truly dead, though.

Sheepdip 01-22-2020 10:36 PM

Re: What's your MPG?
 
If I was to check my mileage I'd probably quit driving Otis, so I'll just keep driving him.

Sweeet67 01-22-2020 10:44 PM

Re: What's your MPG?
 
By today’s standards? Not good. Lol
I do have a bigger grin on my face though.

HO455 01-22-2020 10:53 PM

Re: What's your MPG?
 
67 Burban with a generic SB 350, T400 and a Qjet. Low 12 mpg city. High 14 mpg highway. That's a flat highway with no wind and a steady 60 mph. Add hills or wind or 65 mph it's back to 12. :lol: I've got an overdrive upgrade in the works, I'm hoping to get a solid 15 out of it and maybe get the city to come up a bit.

LS short box 01-22-2020 10:58 PM

Re: What's your MPG?
 
On my 68 C10 LS1/T56 swap I've seen 22 mpg on most 60-65 mph drives in the country. 4:10 gears. 20 inch wheels. The T56 has the .50 overdrive in 6th. The LS1 was tuned on a chassis dyno and then "road" tuned on the laptop after a couple of weeks of break in driving. RWHP 380 hp.Basic LS1 rebuild. AFR heads,forged rods and pistons. Small cam 220I/225E. 114 c/l.
I know it's not monster hp numbers but it runs really well and it's not slow. Around town only about 18 mpg.

WorkinLonghorn 01-23-2020 03:05 AM

Re: What's your MPG?
 
I was getting 11 mixed driving. After break-in I'll check this new crate engine for any increase (maybe a big 12 MPG if lucky). -BA

special-K 01-23-2020 03:30 PM

Re: What's your MPG?
 
I get truck mileage.

Steeveedee 01-23-2020 04:07 PM

Re: What's your MPG?
 
Quote:

Originally Posted by special-K (Post 8664836)
I get truck mileage.

:lol: A guy I used to work with had a bumper sticker on his 1T 4-door 4X4 long bed Ford- "Life isn't only about gas mileage". I like to get economy, but I don't care when I'm pulling the travel trailer, it's just gonna suck the gas down to move the thing. We're going camping middle of next month. We'll see how it does.

Barnfind46 01-23-2020 04:15 PM

Re: What's your MPG?
 
I get between 13 mpg and 15. 13 more than 15.

tdangle 01-23-2020 06:17 PM

Re: What's your MPG?
 
Was around 9-10.5 city/hwy did not make a difference with the TH350 trans and 4.10 gears. Now around 10-11 around town and just last week 16.2 at 70-75 mph on the hwy with my 2004r od trans.

Montierth 01-23-2020 06:36 PM

Re: What's your MPG?
 
I bet I could squeeze a couple more MPG out of my truck but I'm still the the breaking in - joyriding time with my new engine. I'm having too much fun laying into the gas pedal.

mygmctruck1 01-23-2020 11:47 PM

Re: What's your MPG?
 
I have never cared about fuel mileage , if I can not afford fuel after my investment , then why do I have this thing .
But just for kicks my 351 modified Mach 1 gets 18 mph

GMC72BB 01-24-2020 12:10 AM

Re: What's your MPG?
 
72 Big Block 402, with mild cam, roller rockers, Holley, etc, foot on the skinny pedal, I get gallons per hour,,,,not miles per gallon,,

mygmctruck1 01-24-2020 12:27 AM

Re: What's your MPG?
 
Quote:

Originally Posted by GMC72BB (Post 8665118)
72 Big Block 402, with mild cam, roller rockers, Holley, etc, foot on the skinny pedal, I get gallons per hour,,,,not miles per gallon,,

Or gallons per mile !

underliner6 01-24-2020 09:26 AM

Re: What's your MPG?
 
I get a consistent 39 smiles per gallon/ Highway and 30 smiles per gallon/ City. :)

mygmctruck1 01-24-2020 10:02 AM

Re: What's your MPG?
 
Quote:

Originally Posted by underliner6 (Post 8665237)
I get a consistent 39 smiles per gallon/ Highway and 30 smiles per gallon/ City. :)

But not in a truck

Custom 68 01-24-2020 11:07 AM

Re: What's your MPG?
 
Smiles are where its at...
I don't do too bad around 17 on the highway. mine is a 5.3 mild cam and turbo thru a 4l80 and 3.73 gears. It sure is fun tho.
Dave

OregonNed 01-24-2020 11:30 AM

Re: What's your MPG?
 
Whenever I check, about 14

Montierth 01-24-2020 11:53 AM

Re: What's your MPG?
 
My 03 Silverado single cab short bed only gets 16 MPG. So I think anywhere near there is good.

toolboxchev 01-24-2020 01:03 PM

Re: What's your MPG?
 
Better even, I just pay for the fuel as I do not make a car payment.

For me that is the question answered for accounting purposes.

Montierth 01-24-2020 01:15 PM

Re: What's your MPG?
 
I agree with you all. I'm gonna drive it no matter the MPG. Just was curious if I was in the ballpark for MPG

mygmctruck1 01-24-2020 01:32 PM

Re: What's your MPG?
 
My 2017 GMC ext cab gets average 18 mph , if I drive the actual posted speed limit 20 mph

garyd1961 01-24-2020 01:42 PM

Re: What's your MPG?
 
I never checked the mileage on my 70 C10 with a 350 vortec and th350 trans. I do know it gets a lot better mileage if I drive it easy but that ain't no fun.

Truckenrc 01-24-2020 02:13 PM

Re: What's your MPG?
 
I've got a 1969 C10 with a Ls3 and 4L80E and 3.05 gears on 3in lift and 33s. Daily driven 50 miles on the freeway everyday getting 22mpg. But I always seem to have that skinny pedal buried more then I should.


All times are GMT -4. The time now is 06:32 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com