How much gas mileage do you get??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gregbr · 03-17-2005, 07:06 AM

I was wondering how much gas mileage people were getting with different engine/trans/gear ratio combos. Tell your MPG and your drivetrain please.

My 97 Chevy 4wd extra cab gets 14.5 MPG with the 350/4l60e/3.42 ratio rears (I think).

bobs409 · 03-17-2005, 07:42 AM

1969 C-10 short stepside, 350/350TH, 3.73 rear gears, 3700 lbs. I get 16 around town. Never checked the highway but the rear gear would hurt mileage for sure.

uk72step · 03-17-2005, 07:52 AM

I reckon about equivalent of 14mpg.. 350SBC, TH400 and I think that's a stock rear end I'm running.
Bizzare thing is I get that ALL the time, towing 75mph everything!! is pretty weird....it only fluctuates by about 1MPG kinda weird I think...
but there ya go....

64fleetside · 03-17-2005, 11:34 AM

Consistent 16 MPG, stock 230/3spd/3.73. Brian

boraxman · 03-17-2005, 11:38 AM

350/350 3.42 rear, dont know what kind of mileage

, dont want to know

jhow66 · 03-17-2005, 11:37 AM

502HO -400 turbo-3.07 Posi=10-11mpg highway (if you keep a "light" foot)

farside847 · 03-17-2005, 11:54 AM

307/350 stock rear (3.73?) and a 2BB carb. I only get 12MPG. Hmmmm. Maybe I need to rebuild tha carb?

chevyfarmer · 03-17-2005, 12:01 PM

1.6L 4 speed manual trans with a 3.42 rear axle, getting 42 miles per gallon..... Whoops that was my chevette I use to have

God I am missing that mileage now.

my 67 shorty with semi modified 355ci, 3 spped manual, 3.73 rear... 15mpg if your really sweet on the right petal..

jcueckert13 · 03-17-2005, 12:05 PM

my 4x4 s10 with a 2.8 v6, 5 speed, and 3.73 rear end gets about 24-26 when i am driving back and forth from school and i get between 20-22 when i am at home driving to work

67ChevyRedneck · 03-17-2005, 12:09 PM

67 Chevy 350/700R4/3.73. 14 town 16 highway

ckhd · 03-18-2005, 01:06 AM

1999 K10 Suburban, 350/4l60e/3.54gears - 14.5mpg
1968 K20 pickup, 350/4 speed/4/57gears - 7mpg
1969 K10 swb pickup, 350/4speed/3.73gears - 20mpg
1972 K10 Suburban - different stages:

When I first got it: worn out targetmaster 350/th350/3.73 - 11mpg
Tranny died: Worn out targetmaster 350/700r4/3.73 - 11mpg
Sick of targetmaster: Built for torque 350/700r4/3.73 - 11mpg

1996 Furd Taurus 3.0/AX4N - 25mpg
1986 Nissan Maxima 3.0/who knows - 33mpg
1990 Geo Metro (daily driver) very worn out 1.0/5speed - 50mpg
Had a 1992 Geo Metro, bought new, 1.0/5speed - 58mpg hwy
1990 Dodge 3/4ton 4wheel drive 5.9td/5speed/3.54 - 23mpg

Those are all that I have tested.

4x4Poet · 03-18-2005, 03:47 AM

Quote:

Originally Posted by ckhd

...1969 K10 swb pickup, 350/4speed/3.73gears - 20mpg....

How did you attain this mileage?

FuelCellGuy · 03-18-2005, 09:03 AM

1968 SWB FLEET, 350 LT1/4L60E, 3:73- 20-22 MPG. I was surprised.

ckhd · 03-18-2005, 08:37 PM

Quote:

Originally Posted by 4x4Poet

How did you attain this mileage?

350 w 9:1 compression ratio, can't remember the cam, but I specifically picked it to have low-end tourque, factory intake (from a '77 camaro - all the engine castings were from the same Camaro), bias ply tires (don't know if it has anything to do with it), METICULOUSLY tuned quadrajet, 1977 Camaro HEI, Mobil-1 10w30, Heddman Headers, glasspacks, dual exhaust, everything properly aligned, lubed, adjusted, and one of the most important things, KEEP YER FOOT OUT OF IT!! Never tried it with the tailgate down to see if I could pick up any. At the time, I thought putting the tailgate down for mileage was BS, plus I didn't want to lose my spare or my jack.

I got 19mpg pulling a small flatbet trailer with a Chevy Sprint on it fully loaded with everything I owned.

I have that pickup parked at the moment (dreaming of a full resto), I put that engine into the '72 suburban hoping to pick up a few mpg, but it didn't happen.

I don't know if I forgot anything.

gregbr · 03-17-2005, 12:24 PM

uk72step, I had a 69 4wd blazer years ago and I put the torker 2 cam in and it got 11 MPG no matter what you did. Yes, it's wierd.

shifty · 03-17-2005, 12:32 PM

Thanks a ton for posting this thread. I wanted to see a similar thread, just didn't want to be the guy who started it

I've got a 68 step SWB w/L6 250 with a 1bbl carb and 3 on the tree. I get ~15-16MPG on the highway from what I can tell (65-70MPH). Not sure about city miles. The truck has plenty of 'pep', but I want to put something bigger in it. Not thinking as big as an LS1 or LT1 - more like the 4.8L V8 vortec engine that was in my '03 Sierra. I got 19-21 MPG highway with aftermarket intake and one of those hypertech programmer things.

busterwivell · 03-17-2005, 03:49 PM

71 1 Ton Longhorn, 402, 700R4, 4:10 or 4:11 rear gear. 11MPG uphill, downhill, empty, full, towing or not. 11 MPG in town or highway..........but, man, can that thing pull my water trailer uphill! I get asked all the time what it has in it, cuz I pass everybody going up the hill.

72 CustomCamper · 03-17-2005, 04:08 PM

1972 C20 4:10 dana 60 rear 700R4 trans can't remember tire size but they are at least 33" 400 hp 396 she gets about 5 mpg. 1986 K10 10 bolt 3:08 rears 700R4 trans stock 305 gets about 10 mpg...

Chuck

*screamin_c102* · 03-17-2005, 04:16 PM

He[[, it's been so long since I drove screamin, I dun forgot

307 w/4brl and HEI / TH350 / 3.73 gears / 275/50/15 skins = 13MPG

With the gate down I can squeeze out 14MPG

LUV2XCLR8 · 03-17-2005, 04:20 PM

1989 - MY BEAT UP DAILY DRIVER (HOND@) 37 MPG

1970 - 250/350T/4.10 AROUND 16-20 (SOLD TO GEN3)

1967 - 400/PG/3.73 AROUND 8-12 (SOLD LAST SUMMER)

"GQ" - 425HP - 350/350T/NP205/3.08'S (NOT GOOD ???)

724wdcopper · 03-17-2005, 04:34 PM

72 4x4, stock 95 350 with quadrajet, 350 trans, 31" tires, 3.43? rear end, 11 MPG, 12 with the tailgate down. city & highway for both. but i know i am running rich, just havent taken the time to adjust.

72gord · 03-17-2005, 04:53 PM

2001 2500HD 8.1 6 speed 4.10-12mpg 2000 Tahoe 5.3 16-17mpg 92 f-250 460 auto (short trips only) 5mpg...what a gas hog

special70gmc · 03-17-2005, 05:29 PM

355/350 buit with a dana 60 4:10 rear gear around 5-7 but thats with a 17 year old foot and duel 450 holleys

but during those couple miles she hauls ass!!

Lemield · 03-17-2005, 05:35 PM

70 CST 383 TH350 GV overdrive 3:07 gears.....around 15 in town. Don't know on highway.

70 C20 454 TH400 - best so far 10.4 (WOW!)

49 CJ2a Jeep - 18-19 MPG

2002 VW TDI Beetle, 51 MPG highway, average 44 city.

VW can make high mileage claims for their cars because you don't have to buy fuel for them when they are sitting in the service bay!

Stanford · 03-17-2005, 05:40 PM

My '71 with a 350/350 and 3:73's out back, it gets 12 no matter what I'm doing. The '97 pointiac grand prix GTP that I bought two weeks ago get around 20 in town and 26 on the highway, and its supercharged.

03-17-2005, 07:06 AM	#1
gregbr Senoir Member Join Date: Mar 2002 Location: Rock Hill, SC USA Posts: 1,214	How much gas mileage do you get??? I was wondering how much gas mileage people were getting with different engine/trans/gear ratio combos. Tell your MPG and your drivetrain please. My 97 Chevy 4wd extra cab gets 14.5 MPG with the 350/4l60e/3.42 ratio rears (I think). __________________ 67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4" 70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010 70 GMC Restoration Pictures http://67-72chevytrucks.com/gallery/...00&ppuser=4424

03-17-2005, 07:42 AM	#2
bobs409 1969 Custom 30 wrecker Join Date: Sep 2001 Location: Pottsville, Pa Posts: 2,611	1969 C-10 short stepside, 350/350TH, 3.73 rear gears, 3700 lbs. I get 16 around town. Never checked the highway but the rear gear would hurt mileage for sure. __________________ 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

03-17-2005, 07:52 AM	#3
uk72step outta the car velocityboy Join Date: Nov 2004 Location: Scotland Posts: 112	I reckon about equivalent of 14mpg.. 350SBC, TH400 and I think that's a stock rear end I'm running. Bizzare thing is I get that ALL the time, towing 75mph everything!! is pretty weird....it only fluctuates by about 1MPG kinda weird I think... but there ya go.... __________________ ..give it a turn here, take some wedge out there, we'll win some races...

03-17-2005, 11:38 AM	#5
boraxman Keepin an eye out Join Date: Feb 2003 Location: So.Cal Posts: 3,921	350/350 3.42 rear, dont know what kind of mileage , dont want to know __________________ 1970 Chevy C10 SWB 5.3 1996 Toyota Tacoma SR5 4x4 2007 Vespa GTS 250 Scooter ZIP 91351

03-17-2005, 11:37 AM	#6
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	502HO -400 turbo-3.07 Posi=10-11mpg highway (if you keep a "light" foot) __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

03-17-2005, 11:34 AM	#4
64fleetside Registered User Join Date: Apr 2004 Location: arkieland Posts: 1,070	Consistent 16 MPG, stock 230/3spd/3.73. Brian

03-17-2005, 11:54 AM	#7
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	307/350 stock rear (3.73?) and a 2BB carb. I only get 12MPG. Hmmmm. Maybe I need to rebuild tha carb? __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree

03-17-2005, 12:01 PM	#8
chevyfarmer Registered User Join Date: Feb 2005 Location: Owosso, Mi Posts: 242	1.6L 4 speed manual trans with a 3.42 rear axle, getting 42 miles per gallon..... Whoops that was my chevette I use to have God I am missing that mileage now. my 67 shorty with semi modified 355ci, 3 spped manual, 3.73 rear... 15mpg if your really sweet on the right petal.. __________________ 67 short wide 355ci 3 on tree 69 short wide 250ci 3 on tree 68 long wide 283 3 on tree 72 2wd Blazer project 454 5 speed

03-17-2005, 12:05 PM	#9
jcueckert13 Registered User Join Date: Apr 2003 Location: Edgewood New Mexico Posts: 2,088	my 4x4 s10 with a 2.8 v6, 5 speed, and 3.73 rear end gets about 24-26 when i am driving back and forth from school and i get between 20-22 when i am at home driving to work __________________ 1990 subaru legcy (daily driver) 1987 Toyota 4runner (weekend toy) 1968 C30 flatbed dually 1970 C10 longbed stepside (in pieces) 1976 Dodge Dart 1963 Dodge Dart

03-17-2005, 12:09 PM	#10
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	67 Chevy 350/700R4/3.73. 14 town 16 highway __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

03-18-2005, 01:06 AM	#11
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	1999 K10 Suburban, 350/4l60e/3.54gears - 14.5mpg 1968 K20 pickup, 350/4 speed/4/57gears - 7mpg 1969 K10 swb pickup, 350/4speed/3.73gears - 20mpg 1972 K10 Suburban - different stages: When I first got it: worn out targetmaster 350/th350/3.73 - 11mpg Tranny died: Worn out targetmaster 350/700r4/3.73 - 11mpg Sick of targetmaster: Built for torque 350/700r4/3.73 - 11mpg 1996 Furd Taurus 3.0/AX4N - 25mpg 1986 Nissan Maxima 3.0/who knows - 33mpg 1990 Geo Metro (daily driver) very worn out 1.0/5speed - 50mpg Had a 1992 Geo Metro, bought new, 1.0/5speed - 58mpg hwy 1990 Dodge 3/4ton 4wheel drive 5.9td/5speed/3.54 - 23mpg Those are all that I have tested. __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?

03-18-2005, 09:03 AM	#13
FuelCellGuy FUEL CELL GURU Join Date: Aug 2003 Location: Mineola, Texas Posts: 993	1968 SWB FLEET, 350 LT1/4L60E, 3:73- 20-22 MPG. I was surprised.

03-17-2005, 12:24 PM	#15
gregbr Senoir Member Join Date: Mar 2002 Location: Rock Hill, SC USA Posts: 1,214	uk72step, I had a 69 4wd blazer years ago and I put the torker 2 cam in and it got 11 MPG no matter what you did. Yes, it's wierd. __________________ 67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4" 70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010 70 GMC Restoration Pictures http://67-72chevytrucks.com/gallery/...00&ppuser=4424

03-17-2005, 12:32 PM	#16
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,376	Thanks a ton for posting this thread. I wanted to see a similar thread, just didn't want to be the guy who started it I've got a 68 step SWB w/L6 250 with a 1bbl carb and 3 on the tree. I get ~15-16MPG on the highway from what I can tell (65-70MPH). Not sure about city miles. The truck has plenty of 'pep', but I want to put something bigger in it. Not thinking as big as an LS1 or LT1 - more like the 4.8L V8 vortec engine that was in my '03 Sierra. I got 19-21 MPG highway with aftermarket intake and one of those hypertech programmer things. __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

03-17-2005, 03:49 PM	#17
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	71 1 Ton Longhorn, 402, 700R4, 4:10 or 4:11 rear gear. 11MPG uphill, downhill, empty, full, towing or not. 11 MPG in town or highway..........but, man, can that thing pull my water trailer uphill! I get asked all the time what it has in it, cuz I pass everybody going up the hill. __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com



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03-17-2005, 04:08 PM	#18
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,369	1972 C20 4:10 dana 60 rear 700R4 trans can't remember tire size but they are at least 33" 400 hp 396 she gets about 5 mpg. 1986 K10 10 bolt 3:08 rears 700R4 trans stock 305 gets about 10 mpg... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"

03-17-2005, 04:16 PM	#19
screamin_c102 Account Suspended Join Date: Feb 2005 Location: Yoncalla Oregon Posts: 775	He[[, it's been so long since I drove screamin, I dun forgot 307 w/4brl and HEI / TH350 / 3.73 gears / 275/50/15 skins = 13MPG With the gate down I can squeeze out 14MPG

03-17-2005, 04:20 PM	#20
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,484	1989 - MY BEAT UP DAILY DRIVER (HOND@) 37 MPG 1970 - 250/350T/4.10 AROUND 16-20 (SOLD TO GEN3) 1967 - 400/PG/3.73 AROUND 8-12 (SOLD LAST SUMMER) "GQ" - 425HP - 350/350T/NP205/3.08'S (NOT GOOD ???) __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

03-17-2005, 04:34 PM	#21
724wdcopper graphic designer Join Date: May 2004 Location: Spokane, Washington Posts: 841	72 4x4, stock 95 350 with quadrajet, 350 trans, 31" tires, 3.43? rear end, 11 MPG, 12 with the tailgate down. city & highway for both. but i know i am running rich, just havent taken the time to adjust.

03-17-2005, 04:53 PM	#22
72gord Never enough time!! Join Date: Mar 2004 Location: sw Wisconsin Posts: 602	2001 2500HD 8.1 6 speed 4.10-12mpg 2000 Tahoe 5.3 16-17mpg 92 f-250 460 auto (short trips only) 5mpg...what a gas hog

03-17-2005, 05:29 PM	#23
special70gmc Registered User Join Date: Sep 2002 Location: long island, new york Posts: 1,333	355/350 buit with a dana 60 4:10 rear gear around 5-7 but thats with a 17 year old foot and duel 450 holleys but during those couple miles she hauls ass!! Attached Images __________________ 1986 c-10 swb 5/7 drop 20'' coys 1958 belair 2door

03-17-2005, 05:35 PM	#24
Lemield Registered User Join Date: Dec 2004 Location: Arvada Colorado Posts: 1,321	70 CST 383 TH350 GV overdrive 3:07 gears.....around 15 in town. Don't know on highway. 70 C20 454 TH400 - best so far 10.4 (WOW!) 49 CJ2a Jeep - 18-19 MPG 2002 VW TDI Beetle, 51 MPG highway, average 44 city. VW can make high mileage claims for their cars because you don't have to buy fuel for them when they are sitting in the service bay! __________________ Larry 1949 Willys CJ2A, Kubota Turbo Diesel engine, Warn Overdrive, 11 inch brakes, 12volt, Warn M8000 Winch "Little Green" 1970 Rustoleum Roller Red C20 Custom Camper 454 TH400 "Big Red" 1971 K20 6.2 Turbo Diesel 4x4 4spd Ranger Overdrive "Pumpkin Wagon" 2005 VW Beetle Diesel 44+ MPG "Silver Bullet"

03-17-2005, 05:40 PM	#25
Stanford WILLY FOR PRESIDENT!! Join Date: Feb 2004 Location: Wichita, Kansas Posts: 190	My '71 with a 350/350 and 3:73's out back, it gets 12 no matter what I'm doing. The '97 pointiac grand prix GTP that I bought two weeks ago get around 20 in town and 26 on the highway, and its supercharged. __________________ *"He's a high tech REDNECK."* George Jones '67 C/10 FOR SALE!! $600, runs, strait grill, good parts, or beater truck '68 GMC K25, 4x4, current project '71 Custom/10, Crate 350, My Baby!! '97 Pontiac Grand Prix GTP

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