Gas mileage?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gldevall · 04-08-2003, 10:10 PM

Let's see what kind of mileage everybody is getting. Please list motor size, transmission and mileage. I'll start it.

4.3 V-6
TH400
18 mpg

apstguy · 04-08-2003, 10:21 PM

5.0 305 V-8
TH700 - 3.07 gears
10 mpg (I blame it on ESC!)

C&C Chevy · 04-08-2003, 10:35 PM

87 350 TBI
700R4 w/ 3.07's
~12mpg

Badly needs a tune-up though...

Mike76251 · 04-08-2003, 10:54 PM

Quote:

Originally posted by apstguy
5.0 305 V-8
TH700 - 3.07 gears
10 mpg (I blame it on ESC!)

Do this little mod and you can't blame ESC anymore 'cause it bypasses it.
Mike

gchemist · 04-08-2003, 11:02 PM

5.0 tire smoker
700R4
3.08 rearend with 255/60R15's
~15-18 MPG. Lower if I stay on it.

ocbaud · 04-08-2003, 11:08 PM

305 V8
TH350c
2.73 rearend with 275/60R15's
8 or 9 mpg

**swervin ervin** · 04-09-2003, 12:14 AM

What's gas mileage??

Mike76251 · 04-09-2003, 12:32 AM

What's gas mileage? LOL

If it makes you folks feel any better my 1962 Starfire gets around 8 MPG.
You can watch the hand drop on the guage when on it hard.

That's 100+ octane too!!!

My truck;
305
700R4
2.79 gears
14-15 mpg

79GMC454C35 · 04-09-2003, 12:37 AM

454, Turbo 400, 3:42 single wheel 14 bolt. 32" tall tires. 6 to 8 MPG on the highway running empty & about 75 mph. 4 to 6 MPG pulling a trailer or empty running 80 MPH (3000 RPM). This is with 92 octaine fuel. dual 20 gallon tanks, 4 miles to the gallon, $2.29 a gallon gas, You can watch the fuel guage move & your wallet empty as you cruise. Do I win?

Mike76251 · 04-09-2003, 01:36 AM

I don't see why you wouldn't win!!!!!
Do you belong to OPEC?????
You should.

Quote:

Originally posted by 79GMC454C35
454, Turbo 400, 3:42 single wheel 14 bolt. 32" tall tires. 6 to 8 MPG on the highway running empty & about 75 mph. 4 to 6 MPG pulling a trailer or empty running 80 MPH (3000 RPM). This is with 92 octaine fuel. dual 20 gallon tanks, 4 miles to the gallon, $2.29 a gallon gas, You can watch the fuel guage move & your wallet empty as you cruise. Do I win?

MSL · 04-09-2003, 01:58 AM

Gas mileage heck its a truck i dont pay attention i just put gas in when i need it.lol if i want mileage i drive my wifes car.

79BIG10 · 04-09-2003, 03:49 AM

350 ZZ4
TH350
3.07 rear gears
13-14 MPG in a 5,000 LB. truck minus driver

CHaingKaiShek · 04-09-2003, 04:05 AM

1973 350 (Orig motor, maybe rebuilt once.)
TH-350
3.07 rear gears
235/75r-15's (I think

)

Get 8-10mph on average, depending on how hard I throttle the truck or what grade of fuel I put in.

Have gotten 13mpg a couple of tanks ago, but that was before I went out and tinkered with the carb.

Jeff

bigd65 · 04-09-2003, 08:21 AM

85 C10
350 with little mods (cam, ignition, carb)
700R4 with expensive mods (1800.00 now)
3.42 rear and 275x60x15 tires
15 mpg the way i drive

could probably be better milage but thats no fun

Cole's 87 · 04-09-2003, 08:54 AM

461cid
400turbo/2400 stall
3.08 rear end
8-10MPG

Low87 · 04-09-2003, 09:39 AM

5.0 V8 305 tire smoker (LMAO)
TBI
700R4
Current mileage is 0 (0 miles on 0 gallons)
I used to get 18-21 around town.

Bill W · 04-09-2003, 09:46 AM

1991 4x4/ 1/2 ton sub, 16 hwy

1978 4x4 1/2 ton pickup 14 hwy

Both have 3.73 gears. Sub has overdrive.

Bill

WheelsUpRacing · 04-09-2003, 09:48 AM

11.5 MPG
79 1 Ton, dual wheel Dump bed
350, Granny Low 4 Speed
Edelbrock Performer kit (Cam / Lifters, Intake, Carb)
Will accelerate up the hills here in Tn. pulling a Loaded 2 car hauler...

Slonaker · 04-09-2003, 12:13 PM

305
stock except for duals and a performance cam
TH-350C
3:08 gears
11.5 mpg around town

I am in the middle of a cam swap back to stock, and I'm hoping that will help.

Slonaker

69Elky · 04-09-2003, 12:41 PM

i can't see why or how you guys get that bad of mileage in those trucks

i've got a 305 in my el camino with a big cam,intake,carb headers exhaust everything and 4.11 gears in the back and i get around 12 on the highway whining at 5k not that i do it much:P

Tom · 04-09-2003, 12:53 PM

383 v8
muncie M20
3.42 rear
10MPG

AND

350 v8
2004R w/ 2200rpm stall
3.42 rear
8-10 city, 18 freeway [

]

gldevall · 04-09-2003, 01:08 PM

Boy, this is really discouraging. Makes the little V-6 look pretty good. But like it was said earlier, "gas mileage??" I think I can live with the added power of the 350. I'll let everyone know what I get with it, too.

PHOENIX · 04-09-2003, 02:43 PM

C10 2wd
Engine/Motor: Crate 350 (Mexico)
Transmission: sm465 (4-speed manual w/ granny

)
Rear Gears: unknown at this time

MPG City: 10-14
MPG Highway (60-70 mph): 11-16 (estimate)

My MPG may be off by a bit. My gauge has a bounce to it due to the f*cked up tranny connection, so Im sure my miles traveled is off some.
My fuel level gauge is also not hooked up, so I get gas roughly every 70 miles or so just to be safe.

terrible_buddhi · 04-09-2003, 04:22 PM

I am in the process of going to a tuned port injection system on my 383...I think I am around 12 mpg now, I will see what kind of increase I get after this.

TIMSPEED · 04-09-2003, 04:44 PM

Hmmm..it's amazing how many nice trucks, have little 305's...wow, I guess that 305 was a DAMN popular motor back in the day. Sure glad mine came factory with a 350/4bbl

04-08-2003, 10:10 PM	#1
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	Gas mileage?? Let's see what kind of mileage everybody is getting. Please list motor size, transmission and mileage. I'll start it. 4.3 V-6 TH400 18 mpg __________________ 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

04-08-2003, 10:21 PM	#2
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	5.0 305 V-8 TH700 - 3.07 gears 10 mpg (I blame it on ESC!) __________________ 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

04-08-2003, 11:02 PM	#5
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	5.0 tire smoker 700R4 3.08 rearend with 255/60R15's ~15-18 MPG. Lower if I stay on it. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

04-09-2003, 12:14 AM	#7
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	What's gas mileage?? __________________ Mike 1985 Chevy C-10

04-09-2003, 01:58 AM	#11
MSL Registered User Join Date: Mar 2003 Location: So.Oregon Posts: 765	Gas mileage heck its a truck i dont pay attention i just put gas in when i need it.lol if i want mileage i drive my wifes car. Last edited by MSL; 04-09-2003 at 04:01 AM.

04-08-2003, 10:35 PM	#3
C&C Chevy Registered User Join Date: Feb 2003 Location: Midwest City, OK Posts: 1,001	87 350 TBI 700R4 w/ 3.07's ~12mpg Badly needs a tune-up though...

04-08-2003, 11:08 PM	#6
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	305 V8 TH350c 2.73 rearend with 275/60R15's 8 or 9 mpg

04-09-2003, 12:32 AM	#8
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,500	What's gas mileage? LOL If it makes you folks feel any better my 1962 Starfire gets around 8 MPG. You can watch the hand drop on the guage when on it hard. That's 100+ octane too!!! My truck; 305 700R4 2.79 gears 14-15 mpg

04-09-2003, 12:37 AM	#9
79GMC454C35 Registered User Join Date: Mar 2003 Location: Arizona Posts: 115	454, Turbo 400, 3:42 single wheel 14 bolt. 32" tall tires. 6 to 8 MPG on the highway running empty & about 75 mph. 4 to 6 MPG pulling a trailer or empty running 80 MPH (3000 RPM). This is with 92 octaine fuel. dual 20 gallon tanks, 4 miles to the gallon, $2.29 a gallon gas, You can watch the fuel guage move & your wallet empty as you cruise. Do I win?

04-09-2003, 03:49 AM	#12
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	350 ZZ4 TH350 3.07 rear gears 13-14 MPG in a 5,000 LB. truck minus driver __________________ 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

04-09-2003, 04:05 AM	#13
CHaingKaiShek I love goooooold! Join Date: Jan 2003 Location: In the middle of Hell, Arizona Posts: 133	1973 350 (Orig motor, maybe rebuilt once.) TH-350 3.07 rear gears 235/75r-15's (I think ) Get 8-10mph on average, depending on how hard I throttle the truck or what grade of fuel I put in. Have gotten 13mpg a couple of tanks ago, but that was before I went out and tinkered with the carb. 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."

04-09-2003, 08:21 AM	#14
bigd65 Registered User Join Date: Mar 2000 Location: Lake Jackson, TX. Posts: 1,930	85 C10 350 with little mods (cam, ignition, carb) 700R4 with expensive mods (1800.00 now) 3.42 rear and 275x60x15 tires 15 mpg the way i drive could probably be better milage but thats no fun __________________ 2004 Silverado Crewcab (Dark Spiral Gray)

04-09-2003, 08:54 AM	#15
Cole's 87 Registered User Join Date: Nov 2002 Posts: 272	461cid 400turbo/2400 stall 3.08 rear end 8-10MPG

04-09-2003, 09:39 AM	#16
Low87 been here longer than Liz Join Date: Feb 2000 Location: Broken Arrow, OK Posts: 2,437	5.0 V8 305 tire smoker (LMAO) TBI 700R4 Current mileage is 0 (0 miles on 0 gallons) I used to get 18-21 around town. __________________ ~Greg~ Mac's Garage '87 SWB 6/8 drop "Piso" '08 CCSB Silverado DD the departed '89 GMC K5 Jimmy 4x4 "Rusty Nuts" '77 Chevy K5 Blazer 2wd '83 Chevy stepside "You get what you pay for" - Mike 'swervin ervin' Ervin

04-09-2003, 09:46 AM	#17
Bill W Registered User Join Date: Mar 2003 Location: Oregon Posts: 229	1991 4x4/ 1/2 ton sub, 16 hwy 1978 4x4 1/2 ton pickup 14 hwy Both have 3.73 gears. Sub has overdrive. Bill



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04-09-2003, 09:48 AM	#18
WheelsUpRacing Registered User Join Date: Mar 2003 Location: 10se Posts: 14	Hmmm 11.5 MPG 79 1 Ton, dual wheel Dump bed 350, Granny Low 4 Speed Edelbrock Performer kit (Cam / Lifters, Intake, Carb) Will accelerate up the hills here in Tn. pulling a Loaded 2 car hauler... __________________ Don't write a Check your car can't Cash http://1ton.bappy.com

04-09-2003, 12:13 PM	#19
Slonaker Insert Witty Text Here Join Date: Oct 2002 Location: San Antonio, TX Posts: 3,415	305 stock except for duals and a performance cam TH-350C 3:08 gears 11.5 mpg around town I am in the middle of a cam swap back to stock, and I'm hoping that will help. Slonaker __________________ '86 Chevy C10 (Sold 04/19/13 ) Stock '01 Silverado

04-09-2003, 12:41 PM	#20
69Elky Registered User Join Date: Dec 2002 Posts: 121	i can't see why or how you guys get that bad of mileage in those trucks i've got a 305 in my el camino with a big cam,intake,carb headers exhaust everything and 4.11 gears in the back and i get around 12 on the highway whining at 5k not that i do it much:P

04-09-2003, 12:53 PM	#21
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,713	383 v8 muncie M20 3.42 rear 10MPG AND 350 v8 2004R w/ 2200rpm stall 3.42 rear 8-10 city, 18 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.

04-09-2003, 01:08 PM	#22
gldevall Registered User Join Date: Mar 2003 Location: Walker, LA Posts: 2,925	Boy, this is really discouraging. Makes the little V-6 look pretty good. But like it was said earlier, "gas mileage??" I think I can live with the added power of the 350. I'll let everyone know what I get with it, too. __________________ 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

04-09-2003, 02:43 PM	#23
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	C10 2wd Engine/Motor: Crate 350 (Mexico) Transmission: sm465 (4-speed manual w/ granny ) Rear Gears: unknown at this time MPG City: 10-14 MPG Highway (60-70 mph): 11-16 (estimate) My MPG may be off by a bit. My gauge has a bounce to it due to the fcked up tranny connection, so Im sure my miles traveled is off some. My fuel level gauge is also not hooked up, so I get gas roughly every 70 miles or so just to be safe. __________________ AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

04-09-2003, 04:22 PM	#24
terrible_buddhi Registered User Join Date: Mar 2003 Posts: 38	I am in the process of going to a tuned port injection system on my 383...I think I am around 12 mpg now, I will see what kind of increase I get after this.

04-09-2003, 04:44 PM	#25
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	Hmmm..it's amazing how many nice trucks, have little 305's...wow, I guess that 305 was a DAMN popular motor back in the day. Sure glad mine came factory with a 350/4bbl __________________ I have a few cars... See Them Here

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