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#1 |
Dork For Days
Join Date: Aug 2005
Location: Dallas
Posts: 407
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Just wondering how everyone does on gas. I'm new to these trucks and my project truck still needs a carb rebuild, so I can't complain too much I guess.
Here's my setup: '72 C20, 402, Q-jet 4bbl, 700R4 tranny, Dana 60 with 3.54s Average MPG so far (70/30 city/hwy mix): 10.8 MPG Now here's the rule - no embellishing your figures. No rounding up, etc., so I don't want to see anybody running a 500 hp 454 with 4.10s averaging 24 MPG! Sorry, not gonna happen! ![]() ![]() |
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#2 |
Son Of Gravel Man
Join Date: Mar 2005
Location: Cleveland OH
Posts: 638
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With a 400 small block 700r4 trans and 2 brl holly carb................ I really dont wanna know.
I thought about it when gas was at $3.00 but its my daily driver and don't wanna know how ![]() |
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#3 |
Registered User
Join Date: Aug 2005
Location: pleasanton, CA
Posts: 570
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10 before i put on my rebuilt carb and a tune, i HOPE for 13 after this. 350 and NP435 4x2 3.73(will be 3.42 hopefully soon)
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-Steve |
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#4 |
"Bondo, just say no!"
Join Date: Sep 2005
Location: Barrie Ontario Canada
Posts: 75
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I'm driving my 350/350 4bbl all around north america this spring for the next couple years. I would love to know who's getting what for mileage?
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#5 |
Registered User
![]() Join Date: Aug 2005
Location: Hillsboro Oregon
Posts: 6,449
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8 mpg in a factory 396/400 Burb... Daily Driver. Going to 700R4 soon!
Last edited by Frizzle Fry; 10-10-2005 at 11:27 PM. |
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#6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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I did a poll recently on here... http://67-72chevytrucks.com/vboard/s....php3?t=172346
10 -12 is the most common, with 13 - 14 being second most comon. My 500 caddy with 4.10 gears and 31 inch tall rear tires and a non lock up TH350 gets about 10 MPG in town and on the open road. Which is about the same as my old SWB GMC with a 350. |
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#7 |
Registered User
Join Date: Jul 2003
Location: north of Phx AZ about 30 miles
Posts: 698
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Last I checked, with my 350/400, 4.11 gears, I was getting about 12mpg. I could probably get more but it is about 40 mile round trip to get into town on the highway going 75 MPH. If I were just tooling around in town I would expect 13 or 14 MPG, just when those RPM get up to 4000ish the fuel economy dies.
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Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold |
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#8 | |
Where's my beer?
Join Date: Aug 2002
Location: I live in the state of denial....
Posts: 5,621
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Quote:
What the he!!?? I was gonna reply with the same thing, Do you live here or what?? give a guy a chace to reply some ![]() ![]() ![]()
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Paul How do you make the invisible, visible?.........You take it away. |
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#9 |
Born a Chevy Man
Join Date: Apr 2005
Location: Navarre, Florida
Posts: 10,221
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I have not checked my '70 lately but on the '86 swb w/350 and 350 tranny the last time I checked between 10 and 12mph. Do not know what the rear is guessing 3:73. Does changing over to a 700R4 help much. Also changing to say a 3:08 gears? I am thinking about doing something to help boost up the mileage on the "86.
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John or 86 (Viet Nam combat Vet-BIG RED ONE) '65-'66 *1986 Chevy SWB Silverado *1984 Chevy Longbed Silverado New Kia Sportage (Wife's car and she loves it) ![]() ![]() If you can read this, YOU NEED TO THANK A TEACHER! If you can read this in ENGLISH, PLEASE THANK A SOLDIER! ![]() GOD BLESS AMERICA AND BLESS OUR FIGHTING TROOPS |
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#10 |
Registered User
Join Date: Jan 2000
Location: Bothell, WA
Posts: 548
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Built 402 (450HP) with TH-350 and 3:07 gears. 15" tires on a LWB 72 Cheyenne. Getting 7-8 at best on premium fuel but having a great time doing it. Limiting myself to one tank of fuel a month so only weekend excursions.
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#11 |
Registered User
Join Date: Jun 2004
Location: Beeville, Texas
Posts: 1,943
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stock 350(Qjet, points, stock air cleaner), TH400, 4.10 No-Spin rear, 33" mud tires. i'm getting about 6-8 in town, maybe 10-12 on the highway.
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RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck Last edited by Robert1970C20rstbukt; 10-10-2005 at 11:59 PM. |
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#12 |
huh ???
Join Date: Nov 2002
Location: Fredericksburg,Va.
Posts: 3,369
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72 C/20 with 66 396 10.5-1 flattops 400 hp, Dana 60 w/ 4:11, 700R4 trans gets about 4 MPG...
Chuck
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90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!" |
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#13 |
1969 Custom 30 wrecker
Join Date: Sep 2001
Location: Pottsville, Pa
Posts: 2,611
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69 short stepside with a 75 Impala 350/th350, 3:73 rear gears and it weighs 3700 without me. I get 16 town & 16 highway. (yep, same both ways)
![]() I can live with my mileage, it's not bad. I drive mine daily. My 72 Chevelle w/307 gets the same thing.
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Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10 |
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#14 |
Registered User
Join Date: May 2002
Location: VA
Posts: 1,337
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76 K5 - Stock 350 w/ Quadra jet, THM350, 3.08s turning 33's - 7MPG average... mostly town driving, she isn't a highway truck.
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69 Chevy C10 88 Sierra 02 2500 Suburban And too many S10s to list! |
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#15 |
Registered User
Join Date: Mar 2001
Location: Hernando, MS USA
Posts: 1,152
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Last time I checked mine, it was 15.3 on a cruise on the Natchez Trace Parkway from Nashville, TN to Jackson, MS. HOWEVER, since then, Putter and I swapped rear axles: I got his 3.73 and he got my 3.07. Since my speedo isn't accurate anymore, I haven't checked it since, but suffice to say, it ain't gettin' 15.3 anymore!
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George Morgan Hernando, MS '69 C-10 swb fleetside '72 GMC swb Stepside |
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#16 |
Registered User
Join Date: Jun 2005
Location: Slatington, PA
Posts: 536
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13.6mpg- 250 cid 6, 3 speed.
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67 C10 LWB Stepside- 250cid 6, 3speed |
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#17 |
Tonawanda 454
Join Date: Mar 2004
Location: Liquid Sunshine State
Posts: 2,755
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last i checked about 8mpg in my 91 R2500 burb with 454
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91 Chevy Suburban Tonawanda 454 R2500 - SOLD!!! ![]() 04 Dodge Durango 5.7L Hemi 2WD, 24K miles (as of July 2011) In the past 30 years about 90% of Fords are still on the road, the other 10% made it home. ------------------- |
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#18 |
Registered User
![]() Join Date: Apr 2004
Location: Sacramento
Posts: 3,737
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I average about $190/ week
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#19 |
Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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13.5mpg on a 307 3 speed with 3.73 in back
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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#20 |
MooMoo
Join Date: Feb 2004
Location: Shapleigh, Maine
Posts: 2,424
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14-15 in the winter 17-18 in the summer, sometimes 20 if I ride the highway a lot and thats my 97 k1500 5.7 litre
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'97 ext 4x4 3" body lift and 7'6" Fisher MM2 '04 Polaris 700 twin EFI **sold 2-1-07** '07 Polaris 800 twin EFI Stealth Limited Edition Support the Board! Or deal with me foo! ![]() Its all fun and games till you find out shes 16. ![]() |
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#21 |
I'm watching you!
Join Date: Feb 2005
Location: Levittown, PA
Posts: 1,822
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About 11-12 on my 250 L6-3 speed w/ 3.73s and 225/75/15s....I want a v8 so I can get 12mpg and horsepower together
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2012 Chevrolet Silverado 1500 Z71 4WD 1993 Chevrolet C-1500 W/T - Blue - 4.3L V-6, 4 speed auto - Dad's (RIP) 1992 Chevrolet S10 - LS swap project 1968 Chevrolet C-10 longbed fleetside - sold ![]() |
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#22 |
Account Suspended
Join Date: Mar 2005
Posts: 453
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My TBI 350 and 700R4 get about 21 mpg
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#23 |
Registered User
Join Date: Apr 2004
Location: arkieland
Posts: 1,070
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I get 16+ consistent w/230/3sp/3.73, but I drive like an old man, got 18.5(!) last tank going really slow(gas was over $3 a gallon),, my 64 w/350/700/3.42 does about the same. Brian
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#24 |
Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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My '97 Saturn gets 30 city / 38 highway
![]() But the best I ever got out of my '72 C10 was 13.5. Needless to say I don't drive it anymore.
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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#25 |
Registered User
Join Date: Jan 2004
Location: Elmira, Oregon
Posts: 449
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71 GMC 3/4. 402 4spd, 3.54 gear 16" rims. Only mods are HEI, Edelbrock intake and carb. 11.5 no matter how I drive it. Loaded, unloaded, highway or city.
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Enjoying life again. Time to get those big blocks rolling. |
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