How many mpg are you getting? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

EJ · 10-26-2002, 02:38 PM

It would be interesting if everyone would share how many Miles Per Gallon they are getting with their trucks. Also if you would state what motor, tranny, rear end ratio and tire size you are using would be helpful. Thanks EJ

crazy longhorn · 10-26-2002, 03:04 PM

Milage......whats that? I get 8- 8 1/2 mpg in the old longhorn. the combo is a flatop 383, with edelbrock rpm top, 400T/TCI verter(2400 stall), 12 bolt posi/ 4.10 richmond coggs on a 28" tall tire......if it were a daily driver, id be sayin

.......lots of fun, but likes to slurp that 93 octain!

crazy AL

Vince M · 10-26-2002, 03:19 PM

Average about 11 MPG, 406SB, TH350, 3.73, 31"tire.

*Zkast* · 10-26-2002, 03:47 PM

Engine combo in sig...

I drove out to Mark25's place the other weekend and got 6.67 miles per gallon WOOOOhoooooo lol

Cant wait to put the 4:11's in and get even worse

Fast is fun... not cheap.

Huck · 10-26-2002, 04:14 PM

72 LWB, 350 crate, headers, HEI, Edelbrock 1406, 96'Chev1/2ton 5 speed gearbox, 235x75R15s, 308posi rear =====21-22mpg on the flats. If towing my bass boat====15mpg. Going up and down mountains in WV====18mpg.
GORDO with a short bed and 700r4 with 373 rear gets 20+. Overdrive transmissions help a lot as does a soft touch on the pedal due to a light wallet!!
Can still get rubber out of 2nd gear when necessary. Now for the killer===============My 1997 C5 CORVETTE WITH A 6 SPEED GETS 31-32 MPG ON THE HIGHWAY AND CAN DELIVER 0-60 IN UNDER 5 SECONDS ANYTIME!!! By the way, the Corvette is for sale at $24,900. ----Huck

HvyChevy454 · 10-26-2002, 04:19 PM

9.33 highway, 454 BB, th350, 3.08 posi, 29x15.5x15 M/T Sportsmans

mikep · 10-26-2002, 04:36 PM

285/16 tires, 3.54 gears , fresh 350 with performer cam in a 9.5:1 350 with world product S/R heads , HEI, quadrajet , close ratio 4 speed weighs in at about 4400 lbs without me in it. I get 12 in the city and about 13 on the hiway.

Chevy409 · 10-26-2002, 04:42 PM

I measure in feet, not miles... I'm gettin' 8 mph with 3.08 gears (which suck) and the rest is in my sig

Russ72C10 · 10-26-2002, 05:27 PM

Get approx. 8mpg in the city and highway. 355ci.... 3.08 gears... 255/60/15 tires. TH350 tranny. It could be downhill, uphill, pulling a trailer, or being pulled behind a tow truck... still 8mpg. LOL!

weasel29gm · 10-26-2002, 05:41 PM

Always 13-14 in town, 16 -17 on a trip. Specs in my sig.

**JIMs70GMC** · 10-26-2002, 06:32 PM

9MPG, 350, 4 speed, 4:10 gears, 325/60R15 tires, a mix of highway and stop and go.

Project1970 · 10-26-2002, 06:45 PM

13-17mpg depending on conditions and my right foot.

Original / stock bottom end 350, Vortec heads (for about 10:1 compression! Chugging premium now!), Edelbrock Performer intake, Edelbrock #1901 Quadrajet, no-name HEI, dual exhaust...the power runs through a decently built 700R4, 3.73 open rear, and 275/60TR15 tires (28" tall).

Patrick Sullivan · 10-26-2002, 07:50 PM

Approx 14 MPG, original 350/350 combo, 4.10 rear end. Running 14 initial advance with 92 octane got me to 14, originally was getting around 10.

Edit: Oh yea, running 31's on the back (32's up front, to level the stance a bit..

)

Sierra · 10-26-2002, 08:04 PM

12 mpg with ZZ4 350, HOT cam, RPM Airgap, TH350 w/2.74 low, 2400 stall converter, 28" tires, 3.42 Posi rearend, AFR 195 heads. Nothin' but fun, and I drive this thing to work every day!

Hooter · 10-26-2002, 09:46 PM

Id be lucky to get 10 miles per gallon. Good ole ls6 454 with 3.73's

71Blazer · 10-26-2002, 11:18 PM

12 mpg
413 SB (400, 60 over)
TH350
3.08 w/ posi
headers/ dual exhaust
bone stock ignition
RV cam?
33x12.50 BFG AT's
Big ol' grin

TPI and HEI are going in next month!!!

BrianStep72 · 10-27-2002, 12:00 AM

I have NOT wanted to think about how FEW MPG i am getting with my truck, but I think it's about 10 -12 mpg.

I have a stock 307, with a Edlebrock 4BBL 600 CFM carb, my 3 on the tree and standard rear end.

I don't thnk folks drive these trucks for the mileage, but....

you could swap in a late model V6 if you wanted to worry about such and wanted an everyday driver 20+ mpg.

just a thought..

Brian

**Desert Rat** · 10-27-2002, 01:05 AM

8 mpg in town almost 10 on freeway thats with the 3.08 rear,wait until the 3.73's go in!!!! its a well running 402t400,cammed,headers,Performer Intake,Edelbrock carb,2 1/2" exh.it was in my 70 Suburban but all stock and origina and got about 10 fully loaded or empty in town or on freeway.both are 1/2 ton.My Blazer im hoping to get worse,and when the other toys comes to life im suspection how many gallons per mile.the 62 Wagon will be built different hopfully 468 Fuel Injected,700R4,18" or 20" wheels,and the stock 3.55 posi.
if its not a

or a

krazy_texan · 10-27-2002, 01:28 AM

my 1971 cheyenne/20 gets about 8mpg in the city and about 10 mpg on the highway if i drive the speed limit but i usally dont. I have got a rebuilt 350 with the original thm350 tranny and for a 3/4 ton truck i have had it clocked at 145 mph as the guy that owned it before me was going to convert it to a 1/2 ton street/strip truck the truck look pretty crummy cause i just wrecked it and being in high school and working fast food gives me far less money supply than most of you guys to rebuild the truck and the picture was taken 2 days before the wreck so you cant see the after math

krazy_texan · 10-27-2002, 01:34 AM

my 1971 cheyenne/20 gets about 8mpg in the city and about 10 mpg on the highway if i drive the speed limit but i usally dont. I have got a rebuilt 350 with the original thm350 tranny and for a 3/4 ton truck i have had it clocked at 145 mph as the guy that owned it before me was going to convert it to a 1/2 ton street/strip truck the truck look pretty crummy cause i just wrecked it and being in high school and working fast food gives me far less money supply than most of you guys to rebuild the truck and the picture was taken 2 days before the wreck so you cant see the after math

oleblue72 · 10-27-2002, 03:54 AM

14mpg. thats at 50mph to work and back daily.

72chevyLWB · 10-27-2002, 10:44 AM

My best so far is 14.16 mpg. Doing 65 for 100 miles and doing 75 bucking a strong wind for 30 miles.
Mild 350 with a 700R4, 3.73 gears and 255/50/17's (27" tall)

**MJN** · 10-27-2002, 10:47 AM

12 on a good day, 350/turbo 350 3:08 posi 12 bolt 35" tire, 4" lift and stupid roof visor. '72 K/5

Fred T · 10-27-2002, 11:14 AM

To calculate my mpg would require a working odometer, which I am not in a hurry to fix. All that I know is that it is less than 10.

350 with medium cam of unknown ancestry, small port heads, HEI, headers, 650 Holley, TH400, 3.90? gears and 31" tires.

treefrog · 10-27-2002, 12:53 PM

I'm running 27.5" tires with a 3.07. Getting 26 City and 31 Highway, with a tricked out out 4 cylinder Toyota. Little slow off the line. TF :p

10-26-2002, 03:19 PM	#3
Vince M Senior Member Join Date: Apr 2000 Location: Orlando, FL Posts: 1,076	Average about 11 MPG, 406SB, TH350, 3.73, 31"tire. __________________ ............................................................ 68 Chevy CST SWB w/LS1, carb & 700r4. Golden Anniversary clone with a few improvements.

10-26-2002, 04:19 PM	#6
HvyChevy454 Slowly getting CRSS... Join Date: Jul 2001 Location: Lutz, Florida Posts: 656	9.33 highway, 454 BB, th350, 3.08 posi, 29x15.5x15 M/T Sportsmans __________________ -Nic Lutz, Fl My Team Website The Heavy Chevy Website ------------------ 72 Cheyenne 10 LWB GM 12-bolt 3.08 w/ Auburn Posi 91 454 Edel Performer RPM Intake 750 cfm carb Comp Cam 268/.495 Hedman Headers Dual 3'' Exhaust 71 Cheyenne 20 4x4 Fact. A/C PS PB Tilt Currently in the works... Speak Softly and Carry A Big Block... There is No replacement for Displacement... "If everything seems under control, you're just not going fast enough." - Mario Andretti

10-26-2002, 04:36 PM	#7
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	285/16 tires, 3.54 gears , fresh 350 with performer cam in a 9.5:1 350 with world product S/R heads , HEI, quadrajet , close ratio 4 speed weighs in at about 4400 lbs without me in it. I get 12 in the city and about 13 on the hiway. __________________ No truck :-(

10-26-2002, 04:42 PM	#8
Chevy409 Giddy up giddy up... Join Date: Feb 2001 Location: US Posts: 483	I measure in feet, not miles... I'm gettin' 8 mph with 3.08 gears (which suck) and the rest is in my sig __________________ 72 with 69 grille and custom 73-87 stepside. BIG BLOCK 409, SM465, NP205, 3/4 axles slung under a 5" lift, 3"bodylift, 112" frame, and 35inch Pro Comp X-terrains... "BUILT NOT BOUGHT" Here's the site...

10-26-2002, 05:27 PM	#9
Russ72C10 Four Wheeler Join Date: Jul 2002 Location: Decatur, IL Posts: 101	Get approx. 8mpg in the city and highway. 355ci.... 3.08 gears... 255/60/15 tires. TH350 tranny. It could be downhill, uphill, pulling a trailer, or being pulled behind a tow truck... still 8mpg. LOL! __________________ '84 K20 4x4 350 V8 - Weiand intake - Headers - 4" Tuff Country lift - 35x12.50 ProComp M/Ts on 15x10s

10-26-2002, 02:38 PM	#1
EJ Registered User Join Date: Jul 2000 Location: El Dorado Springs, MO Posts: 227	How many mpg are you getting? It would be interesting if everyone would share how many Miles Per Gallon they are getting with their trucks. Also if you would state what motor, tranny, rear end ratio and tire size you are using would be helpful. Thanks EJ

10-26-2002, 03:04 PM	#2
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	Milage......whats that? I get 8- 8 1/2 mpg in the old longhorn. the combo is a flatop 383, with edelbrock rpm top, 400T/TCI verter(2400 stall), 12 bolt posi/ 4.10 richmond coggs on a 28" tall tire......if it were a daily driver, id be sayin .......lots of fun, but likes to slurp that 93 octain! crazy AL

10-26-2002, 03:47 PM	#4
Zkast Account Suspended Join Date: May 2002 Location: Olathe, Kansas Posts: 929	Engine combo in sig... I drove out to Mark25's place the other weekend and got 6.67 miles per gallon WOOOOhoooooo lol Cant wait to put the 4:11's in and get even worse Fast is fun... not cheap.

10-26-2002, 04:14 PM	#5
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	72 LWB, 350 crate, headers, HEI, Edelbrock 1406, 96'Chev1/2ton 5 speed gearbox, 235x75R15s, 308posi rear =====21-22mpg on the flats. If towing my bass boat====15mpg. Going up and down mountains in WV====18mpg. GORDO with a short bed and 700r4 with 373 rear gets 20+. Overdrive transmissions help a lot as does a soft touch on the pedal due to a light wallet!! Can still get rubber out of 2nd gear when necessary. Now for the killer===============My 1997 C5 CORVETTE WITH A 6 SPEED GETS 31-32 MPG ON THE HIGHWAY AND CAN DELIVER 0-60 IN UNDER 5 SECONDS ANYTIME!!! By the way, the Corvette is for sale at $24,900. ----Huck

10-26-2002, 05:41 PM	#10
weasel29gm SLOW BUT SURE,BUT CLOSER Join Date: Feb 2002 Location: eleanor wv usa Posts: 3,091	Always 13-14 in town, 16 -17 on a trip. Specs in my sig. __________________ 69 C-10, OWNED 35YRS... 350 over 30, 350 Turbo, 3:73 Posi P/S, P/B Black with red and black int. ''LOVE THESE OLD ''TRUCKS.......

10-26-2002, 06:32 PM	#11
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	9MPG, 350, 4 speed, 4:10 gears, 325/60R15 tires, a mix of highway and stop and go. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

10-26-2002, 06:45 PM	#12
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	13-17mpg depending on conditions and my right foot. Original / stock bottom end 350, Vortec heads (for about 10:1 compression! Chugging premium now!), Edelbrock Performer intake, Edelbrock #1901 Quadrajet, no-name HEI, dual exhaust...the power runs through a decently built 700R4, 3.73 open rear, and 275/60TR15 tires (28" tall). __________________ Project1970 - LS1 Swap Complete!

10-26-2002, 07:50 PM	#13
Patrick Sullivan Transcendental Trucker Join Date: Dec 2001 Location: Rockaway Beach, OR Posts: 374	Approx 14 MPG, original 350/350 combo, 4.10 rear end. Running 14 initial advance with 92 octane got me to 14, originally was getting around 10. Edit: Oh yea, running 31's on the back (32's up front, to level the stance a bit.. ) __________________ Patrick Sullivan \| sullivan@oregoncoast.com Rockaway Beach, Oregon 1972 Chevy Cheyenne C-20 1998 Dodge Dakota 4x4 So, fill to me the parting glass And drink a health whate'er befalls... Then gently rise and softly call Goodnight and joy be to you all!

10-26-2002, 08:04 PM	#14
Sierra Registered User Join Date: Nov 2000 Location: Victoria, Texas Posts: 71	12 mpg with ZZ4 350, HOT cam, RPM Airgap, TH350 w/2.74 low, 2400 stall converter, 28" tires, 3.42 Posi rearend, AFR 195 heads. Nothin' but fun, and I drive this thing to work every day! Last edited by Sierra; 10-26-2002 at 08:15 PM.

10-26-2002, 09:46 PM	#15
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,083	Id be lucky to get 10 miles per gallon. Good ole ls6 454 with 3.73's __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life



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10-26-2002, 11:18 PM	#16
71Blazer Goodbye Darlin' Join Date: Nov 2001 Location: Coupeville, WA USA Posts: 330	12 mpg 413 SB (400, 60 over) TH350 3.08 w/ posi headers/ dual exhaust bone stock ignition RV cam? 33x12.50 BFG AT's Big ol' grin TPI and HEI are going in next month!!! __________________ 1971 Blazer CST SOLD!

10-27-2002, 12:00 AM	#17
BrianStep72 Registered User Join Date: Sep 2000 Location: Maryville, TN Posts: 163	I have NOT wanted to think about how FEW MPG i am getting with my truck, but I think it's about 10 -12 mpg. I have a stock 307, with a Edlebrock 4BBL 600 CFM carb, my 3 on the tree and standard rear end. I don't thnk folks drive these trucks for the mileage, but.... you could swap in a late model V6 if you wanted to worry about such and wanted an everyday driver 20+ mpg. just a thought.. Brian __________________ 1941 Chevy Coupe Streetrod 1964 Chevy Nova SS 1964 Chevy C10 Stepside Pickup 1972 Chevy C10 Stepside Pickup 1987 Chevy IROC Z28 Camaro 1LE+TPI - racecar 2004 Chevy Tahoe 2013 Chevy Silverado Tow Rig -------------------------------------- http://www.bowtieracing.org

10-27-2002, 01:05 AM	#18
Desert Rat Senior Member Join Date: Dec 1999 Location: Darrington, Washington Posts: 3,963	8 mpg in town almost 10 on freeway thats with the 3.08 rear,wait until the 3.73's go in!!!! its a well running 402t400,cammed,headers,Performer Intake,Edelbrock carb,2 1/2" exh.it was in my 70 Suburban but all stock and origina and got about 10 fully loaded or empty in town or on freeway.both are 1/2 ton.My Blazer im hoping to get worse,and when the other toys comes to life im suspection how many gallons per mile.the 62 Wagon will be built different hopfully 468 Fuel Injected,700R4,18" or 20" wheels,and the stock 3.55 posi. if its not a or a

10-27-2002, 01:28 AM	#19
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	my 1971 cheyenne/20 gets about 8mpg in the city and about 10 mpg on the highway if i drive the speed limit but i usally dont. I have got a rebuilt 350 with the original thm350 tranny and for a 3/4 ton truck i have had it clocked at 145 mph as the guy that owned it before me was going to convert it to a 1/2 ton street/strip truck the truck look pretty crummy cause i just wrecked it and being in high school and working fast food gives me far less money supply than most of you guys to rebuild the truck and the picture was taken 2 days before the wreck so you cant see the after math

10-27-2002, 01:34 AM	#20
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	my 1971 cheyenne/20 gets about 8mpg in the city and about 10 mpg on the highway if i drive the speed limit but i usally dont. I have got a rebuilt 350 with the original thm350 tranny and for a 3/4 ton truck i have had it clocked at 145 mph as the guy that owned it before me was going to convert it to a 1/2 ton street/strip truck the truck look pretty crummy cause i just wrecked it and being in high school and working fast food gives me far less money supply than most of you guys to rebuild the truck and the picture was taken 2 days before the wreck so you cant see the after math

10-27-2002, 03:54 AM	#21
oleblue72 No, U Da Man! Join Date: Mar 2001 Location: Southaven, MS Posts: 284	14mpg. thats at 50mph to work and back daily. __________________ (sold ole blue 1972) 1997 Dodge 1500 5.9L 1996 Saturn SL2 1.9L 2002 Mitsubishi Montero 3.0L 2005 Ford Escape 3.0L *1967 Olds Vista Cruiser 330-320HP*

10-27-2002, 10:44 AM	#22
72chevyLWB Got 20's???? Join Date: Oct 2001 Location: Aberdeen SD Posts: 1,451	My best so far is 14.16 mpg. Doing 65 for 100 miles and doing 75 bucking a strong wind for 30 miles. Mild 350 with a 700R4, 3.73 gears and 255/50/17's (27" tall) __________________ 99 Silverado Ex-Cab 2wd, Bagged&WhippleCharged 02 Sierra Ex-Cab 4wd 2500 HD The 72 went down the road.

10-27-2002, 10:47 AM	#23
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 2,988	12 on a good day, 350/turbo 350 3:08 posi 12 bolt 35" tire, 4" lift and stupid roof visor. '72 K/5

10-27-2002, 11:14 AM	#24
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	To calculate my mpg would require a working odometer, which I am not in a hurry to fix. All that I know is that it is less than 10. 350 with medium cam of unknown ancestry, small port heads, HEI, headers, 650 Holley, TH400, 3.90? gears and 31" tires. __________________ Fred There is no such thing as too much cam...just not enough engine.

10-27-2002, 12:53 PM	#25
treefrog Registered User Join Date: May 2002 Location: Knoxville, TN USA Posts: 189	Great Mileage I'm running 27.5" tires with a 3.07. Getting 26 City and 31 Highway, with a tricked out out 4 cylinder Toyota. Little slow off the line. TF :p Last edited by treefrog; 10-27-2002 at 12:57 PM.

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