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01-22-2020, 09:04 PM
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#1 |
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Registered User
Join Date: Dec 2016
Location: QUEEN CREEK, AZ
Posts: 272
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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.
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1970 GMC C1500 short fleet Sellers Regret - 1950 GMC - 1967 Chevy C10 - 1970 GMC C2500 Dually Flat Bed - 2003 Silverado |
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01-22-2020, 09:41 PM
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#2 |
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Who Changed This?
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,724
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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.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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01-22-2020, 10:36 PM
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#3 |
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Senior Member
Join Date: Nov 2018
Location: Waterford California
Posts: 2,634
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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.
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01-22-2020, 10:44 PM
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#4 |
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Registered User
Join Date: Aug 2016
Location: Idaho Falls, ID
Posts: 233
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Re: What's your MPG?
By today’s standards? Not good. Lol
I do have a bigger grin on my face though. |
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01-22-2020, 10:53 PM
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#5 |
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Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,393
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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.
 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.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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01-22-2020, 10:58 PM
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#6 |
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Registered User
Join Date: Jun 2015
Location: Carlos MN
Posts: 2,138
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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. |
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01-23-2020, 03:05 AM
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#7 |
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Senior Member
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,886
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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
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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01-23-2020, 03:30 PM
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#8 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: What's your MPG?
I get truck mileage.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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01-23-2020, 04:07 PM
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#9 | |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,724
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Re: What's your MPG?
Quote:
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.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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01-23-2020, 04:15 PM
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#10 |
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Registered User
Join Date: Aug 2014
Location: Mena,Arkansas
Posts: 485
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Re: What's your MPG?
I get between 13 mpg and 15. 13 more than 15.
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68' with no bells or whistles unless I add'em. |
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01-23-2020, 06:17 PM
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#11 |
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Registered User
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,211
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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.
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Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC |
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01-23-2020, 06:36 PM
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#12 |
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Registered User
Join Date: Dec 2016
Location: QUEEN CREEK, AZ
Posts: 272
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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.
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1970 GMC C1500 short fleet Sellers Regret - 1950 GMC - 1967 Chevy C10 - 1970 GMC C2500 Dually Flat Bed - 2003 Silverado |
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01-23-2020, 11:47 PM
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#13 |
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Registered User
Join Date: Jun 2018
Location: Munising,Mi
Posts: 360
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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 |
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01-24-2020, 12:10 AM
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#14 |
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Registered User
Join Date: Dec 2019
Location: JACKSONVILLE
Posts: 51
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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,,
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01-24-2020, 12:27 AM
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#15 | |
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Registered User
Join Date: Jun 2018
Location: Munising,Mi
Posts: 360
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Re: What's your MPG?
Quote:
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01-24-2020, 09:26 AM
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#16 |
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Registered User
Join Date: Oct 2013
Location: Montrose, CO
Posts: 328
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Re: What's your MPG?
I get a consistent 39 smiles per gallon/ Highway and 30 smiles per gallon/ City.
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Jim 1972 K20 Cheyenne- 350/350/205 1972 K20 Cheyenne - 350/SM465/205 1971 K5 Blazer |
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01-24-2020, 10:02 AM
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#17 | |
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Registered User
Join Date: Jun 2018
Location: Munising,Mi
Posts: 360
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Re: What's your MPG?
Quote:
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01-24-2020, 11:07 AM
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#18 |
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Registered User
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,939
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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
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Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!" |
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01-24-2020, 11:30 AM
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#19 |
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Registered User
Join Date: Dec 2012
Location: Vancouver, Washington
Posts: 1,644
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Re: What's your MPG?
Whenever I check, about 14
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1968 Chevrolet C/10 LWB - 327, TH350 - 4/5 Drop |
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01-24-2020, 11:53 AM
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#20 |
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Registered User
Join Date: Dec 2016
Location: QUEEN CREEK, AZ
Posts: 272
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Re: What's your MPG?
My 03 Silverado single cab short bed only gets 16 MPG. So I think anywhere near there is good.
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1970 GMC C1500 short fleet Sellers Regret - 1950 GMC - 1967 Chevy C10 - 1970 GMC C2500 Dually Flat Bed - 2003 Silverado |
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01-24-2020, 01:03 PM
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#21 |
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Registered User
Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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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. |
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01-24-2020, 01:15 PM
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#22 |
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Registered User
Join Date: Dec 2016
Location: QUEEN CREEK, AZ
Posts: 272
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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
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1970 GMC C1500 short fleet Sellers Regret - 1950 GMC - 1967 Chevy C10 - 1970 GMC C2500 Dually Flat Bed - 2003 Silverado |
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01-24-2020, 01:32 PM
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#23 |
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Registered User
Join Date: Jun 2018
Location: Munising,Mi
Posts: 360
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Re: What's your MPG?
My 2017 GMC ext cab gets average 18 mph , if I drive the actual posted speed limit 20 mph
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01-24-2020, 01:42 PM
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#24 |
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Registered User
Join Date: May 2016
Location: Henderson NC
Posts: 975
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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.
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01-24-2020, 02:13 PM
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#25 |
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Registered User
Join Date: Feb 2019
Location: Vacaville california
Posts: 11
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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.
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