What's your usual MPG? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TIMSPEED · 05-05-2003, 01:01 PM

I think I'm getting 8mpg right now, and it's about 80/20 city/freeway.
355/TH350/4.10 pegleg/28" tire
Carb is still untuned...

**old Rusty C10** · 05-05-2003, 01:03 PM

8-10 on the 1976 but i dont drive it all that often i get asphixiated with the exhaust in there! I aint had the 1986 running to tell ya about that one

gldevall · 05-05-2003, 01:05 PM

With the new 350 I've been getting about 13-14.

gldevall · 05-05-2003, 01:12 PM

Quote:

Originally posted by gldevall
With the new 350 I've been getting about 13-14.

BTW That is in the city.

TIMSPEED · 05-05-2003, 01:12 PM

Quote:

Originally posted by gldevall
With the new 350 I've been getting about 13-14.

You have a 700R4 don't you? Or do you just have high gears? (Like 2.56's)

Tom · 05-05-2003, 01:18 PM

vortec 350, 2004R and 3.42's with a 2300rpm stall gets me about 9mpg city/18mpg freeway

gldevall · 05-05-2003, 01:43 PM

Quote:

Originally posted by TIMSPEED

You have a 700R4 don't you? Or do you just have high gears? (Like 2.56's)

TH400 with 2.73's that's why!! LOL! You have the stump-pulling gears.

TIMSPEED · 05-05-2003, 01:45 PM

Quote:

Originally posted by gldevall
You have the stump-pulling gears.

Trailer-pulling actually! My dad must have really wanted to not drive this thing on the freeway! (Kinda hard to understand why he'd get 4.10's and not dual saddles

)

Grim Reaper · 05-05-2003, 01:50 PM

the 79 4wdK5 I just sold got 12mpg. It had a base crate motor 350,Th350, 3.73 gears, 31 inch tires. Speedo pretty accurate.

My 75 K5 Jimmy gets about 9.5 It's 7ft tall spinning 35 inch BFG muds. Older rebuild motor. 350 Th350,4.10 gears 35's. Speedo reads a little slow might be getting just over 10mpg when you account for that.

My 88 Burb got 10MPG this last tank (checked this morning). Only owned the truck a few weeks and chasing problems. Found 4 bad plug wires on it yesterday. Gave it a full tune up and new O2 sensor. See how it does this next tank. I want 12-13 out of it. 454,TH400, 3.73 gears, 235/85x16 (roughly 31 inch tire). Then I might look inot a Gearvendors OD. See if I can get it up to 16mpg with OD. I know 350 FI OD burbs can pull 18 hwy.

Just bought a GPS last week and going to get a good GPS millage reading and recheck the 75 and 88.

79BIG10 · 05-05-2003, 11:35 PM

13-14 in the city

wHATANERD · 05-05-2003, 11:52 PM

My 1969 Chevy with a 350/400 combination has a 3:73 rear end and running an HEI, is getting about 12.5 GPM.

wHATANERD · 05-05-2003, 11:53 PM

12.5 is a mix of freeway and city, I caculated it last night on a 180 mile trip from south Texas through San Antonio and Austin

^No[z] · 05-05-2003, 11:54 PM

I usually get about 10-11 mpg thats 350/th350

gchemist · 05-06-2003, 01:54 AM

18 MPG on the highway at 70 MPH

~14-16 in the city with 700R4 running in 3rd and 1800 stall.

MylilBowTie · 05-06-2003, 02:30 AM

Currently about 4 mpg.
350 bored 30 over - CompCams 270H Mangnum Cam - World Products S/R Torquer 67cc 2.02 intake 1.60 exhaust - Performer RPM intake - 750 CFM 4 barrel Edelbrock that runs a tad rich - 10:1 compression. TH-350 - 2.73s - 31x10.50

Really need to get that Edelbrock leaned out. Its so rich I can stain the drive way/ side walk or anything in the way of my duals when I start it up. lol

Yeah and I cant use 87(1.25), 89 sometimes but it really likes Sunco 94(1.67 gal).

Prerunner1982 · 05-06-2003, 07:40 AM

mylil and you need lower gears.

*Zilverado* · 05-06-2003, 01:07 PM

Quote:

Originally posted by gchemist
18 MPG on the highway at 70 MPH
~14-16 in the city with 700R4 running in 3rd and 1800 stall.

Gotta love those 305's, eh G-man...

Haven't checked in a while, but last summer - low 20's on the highway and upper teens in the city.

apstguy · 05-07-2003, 12:20 AM

10mpg. No matter what I do, it is always just 10. Unless I put it at WOT - then I can just watch the fuel gauge like a stop-watch.

Stock 305 - 3.08 gears - TH700R4

MSL · 05-07-2003, 01:41 AM

I get 25-30 thats when im pushing it to save gas.lol 10-12 i would say.

arveetek · 05-07-2003, 12:37 PM

19 mpg with 4.10 gears and 700 tranny! That's with a 6.2L diesel pushing it down the road.

In it's previous life, my truck had the stock 305 w/TH350 and 3.42 gears. The best I ever got with that setup was 12 mpg.

LOHRTBT · 05-07-2003, 01:11 PM

damn...your gettin 80 on the highway!! lol

I get about 10-14 max!! 700R4

lofat · 05-08-2003, 12:14 AM

so i calculated my milage today - a nice round trip commute to work and back is 50 miles mostly hiway. i figured i am getting just around 10 mpg. i guess i am a little shocked.

my 1973 chrysler new yorker brougham 4 door boat with a 440 4bbl gets around the same maybe a little better even. i would have guessed that my 1977 c10 with a lighter body and smaller engine would definately drink less.

i am guessing that this is attributed to only having a 3 spd trannsmition.... any ideas? from reading all the posts here i can see what i am getting is average.

it's a stock 350 w/ 60k on the rebuild. it has a t350c tranny - only non stock item on it is the flowmaster.

i don't know - i am thinking it may definately time to think about upgrading to a tranny w/ OD.

any thoughts or insights are welcome.

cheers,
scott

solidaxel · 05-08-2003, 12:32 AM

My stock 350/350 3:42 275-60-17 in town with 150,000 and a recent tune up (major, carb and all ingition componets) last sept. gets 10 to 11 evey week its a 100mi to work and back 8.5 to 9.5 and thats the wife driving, if she lets me drive on weekends its 10+ gals, go figure !!!!!!

CHaingKaiShek · 05-08-2003, 08:47 AM

10-11mpg no matter what I do.

350 V-8, Th-350 3.07s in the rear.. oh yeah, and I'm a lead foot.

Jeff

solidaxel · 05-08-2003, 09:54 AM

Riptide, your right, from gas station to gas station thats when I get to drive it!! When your gas gauge dosen' start to go down until it has 5 gal. left it goes to empty very fast. I have only been able to but in 14 gal. when it runs out of gas, so we keep it filled up after a 100 miles

05-05-2003, 01:01 PM	#1
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	What's your usual MPG? I think I'm getting 8mpg right now, and it's about 80/20 city/freeway. 355/TH350/4.10 pegleg/28" tire Carb is still untuned... __________________ I have a few cars... See Them Here

05-05-2003, 01:03 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	8-10 on the 1976 but i dont drive it all that often i get asphixiated with the exhaust in there! I aint had the 1986 running to tell ya about that one __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

05-05-2003, 01:05 PM	#3
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	With the new 350 I've been getting about 13-14. __________________ Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels

05-05-2003, 01:18 PM	#6
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,748	vortec 350, 2004R and 3.42's with a 2300rpm stall gets me about 9mpg city/18mpg freeway __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

05-05-2003, 01:50 PM	#9
Grim Reaper Registered User Join Date: Jul 2001 Location: Atlanta GA Posts: 1,704	the 79 4wdK5 I just sold got 12mpg. It had a base crate motor 350,Th350, 3.73 gears, 31 inch tires. Speedo pretty accurate. My 75 K5 Jimmy gets about 9.5 It's 7ft tall spinning 35 inch BFG muds. Older rebuild motor. 350 Th350,4.10 gears 35's. Speedo reads a little slow might be getting just over 10mpg when you account for that. My 88 Burb got 10MPG this last tank (checked this morning). Only owned the truck a few weeks and chasing problems. Found 4 bad plug wires on it yesterday. Gave it a full tune up and new O2 sensor. See how it does this next tank. I want 12-13 out of it. 454,TH400, 3.73 gears, 235/85x16 (roughly 31 inch tire). Then I might look inot a Gearvendors OD. See if I can get it up to 16mpg with OD. I know 350 FI OD burbs can pull 18 hwy. Just bought a GPS last week and going to get a good GPS millage reading and recheck the 75 and 88. __________________ Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project

05-05-2003, 11:35 PM	#10
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	13-14 in the city __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

05-05-2003, 11:52 PM	#11
wHATANERD Registered User Join Date: Mar 2003 Location: Uvalde, Tx Posts: 407	My 1969 Chevy with a 350/400 combination has a 3:73 rear end and running an HEI, is getting about 12.5 GPM. __________________ 1969 C/10 Longbed undergoing rebuild. Old Chevy's Never Die, They Just Rust Around The Edges

05-05-2003, 11:53 PM	#12
wHATANERD Registered User Join Date: Mar 2003 Location: Uvalde, Tx Posts: 407	12.5 is a mix of freeway and city, I caculated it last night on a 180 mile trip from south Texas through San Antonio and Austin __________________ 1969 C/10 Longbed undergoing rebuild. Old Chevy's Never Die, They Just Rust Around The Edges

05-05-2003, 11:54 PM	#13
^No[z] Registered User Join Date: May 2003 Posts: 14	I usually get about 10-11 mpg thats 350/th350

05-06-2003, 01:54 AM	#14
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	18 MPG on the highway at 70 MPH ~14-16 in the city with 700R4 running in 3rd and 1800 stall. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

05-06-2003, 02:30 AM	#15
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Currently about 4 mpg. 350 bored 30 over - CompCams 270H Mangnum Cam - World Products S/R Torquer 67cc 2.02 intake 1.60 exhaust - Performer RPM intake - 750 CFM 4 barrel Edelbrock that runs a tad rich - 10:1 compression. TH-350 - 2.73s - 31x10.50 Really need to get that Edelbrock leaned out. Its so rich I can stain the drive way/ side walk or anything in the way of my duals when I start it up. lol Yeah and I cant use 87(1.25), 89 sometimes but it really likes Sunco 94(1.67 gal). __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI Last edited by MylilBowTie; 05-07-2003 at 06:17 AM.

05-06-2003, 07:40 AM	#16
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	mylil and you need lower gears. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

05-07-2003, 12:20 AM	#18
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,087	10mpg. No matter what I do, it is always just 10. Unless I put it at WOT - then I can just watch the fuel gauge like a stop-watch. Stock 305 - 3.08 gears - TH700R4 __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

05-07-2003, 01:41 AM	#19
MSL Registered User Join Date: Mar 2003 Location: So.Oregon Posts: 765	I get 25-30 thats when im pushing it to save gas.lol 10-12 i would say.

05-07-2003, 12:37 PM	#20
arveetek Ultimate Diesel Dude Join Date: Oct 2002 Location: Southwest Missouri Posts: 328	19 mpg with 4.10 gears and 700 tranny! That's with a 6.2L diesel pushing it down the road. In it's previous life, my truck had the stock 305 w/TH350 and 3.42 gears. The best I ever got with that setup was 12 mpg. __________________ Project truck: '81 C/20 converted to 6.2L TURBO DIESEL bored .040", gear drive, 6.5L injectors/pump, custom pistons, custom 4" exhaust, 700R4, 4.10's Daily Driver: '95 K1500 Tahoe, 6.5L TURBO DIESEL, NP241, 4L80E, 3.42's



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05-07-2003, 01:11 PM	#21
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	damn...your gettin 80 on the highway!! lol I get about 10-14 max!! 700R4 __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

05-08-2003, 12:14 AM	#22
lofat Rollin' Member Join Date: May 2003 Location: Hayward, California Posts: 240	so i calculated my milage today - a nice round trip commute to work and back is 50 miles mostly hiway. i figured i am getting just around 10 mpg. i guess i am a little shocked. my 1973 chrysler new yorker brougham 4 door boat with a 440 4bbl gets around the same maybe a little better even. i would have guessed that my 1977 c10 with a lighter body and smaller engine would definately drink less. i am guessing that this is attributed to only having a 3 spd trannsmition.... any ideas? from reading all the posts here i can see what i am getting is average. it's a stock 350 w/ 60k on the rebuild. it has a t350c tranny - only non stock item on it is the flowmaster. i don't know - i am thinking it may definately time to think about upgrading to a tranny w/ OD. any thoughts or insights are welcome. cheers, scott

05-08-2003, 12:32 AM	#23
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	My stock 350/350 3:42 275-60-17 in town with 150,000 and a recent tune up (major, carb and all ingition componets) last sept. gets 10 to 11 evey week its a 100mi to work and back 8.5 to 9.5 and thats the wife driving, if she lets me drive on weekends its 10+ gals, go figure !!!!!! __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

05-08-2003, 08:47 AM	#24
CHaingKaiShek I love goooooold! Join Date: Jan 2003 Location: In the middle of Hell, Arizona Posts: 133	10-11mpg no matter what I do. 350 V-8, Th-350 3.07s in the rear.. oh yeah, and I'm a lead foot. Jeff __________________ "Musha ring dum a doo dum a da Whack for my daddy-o Whack for my daddy-o There's whiskey in the jar-o."

05-08-2003, 09:54 AM	#25
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Riptide, your right, from gas station to gas station thats when I get to drive it!! When your gas gauge dosen' start to go down until it has 5 gal. left it goes to empty very fast. I have only been able to but in 14 gal. when it runs out of gas, so we keep it filled up after a 100 miles __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

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