73 up standard vs auto on gas - The 1947 - Present Chevrolet & GMC Truck Message Board Network

raychevy · 02-09-2003, 06:10 PM

Ive been tossing around the thought of buying a 73 up thats 4wd. Maybe even a 3/4 ton 4*4. Is there a big difference in gas mileage on these between the two transmission types ? I prefer automatic for what I do, but a manual would be nice if it saved several miles to the gallon. Is it true that the 3/4 model uses several more mpg vs the 1/2 model ?

**old Rusty C10** · 02-09-2003, 06:44 PM

ive never noticed that much of a difference in the older trucks in mileage from half to three quarter tons either stick or automatic the three speed chevy desperately needs a fourth gear at high speed ( highway speed ) and it makes the gas mileage lag

TODDS 72 · 02-09-2003, 07:06 PM

my mileage is bout 12 on the highway/10 towing trailer thats loaded/6 or less plowing snow.....i don't think 3/4..1/2 ton makes much differance in the gas its how you drive it,or use it..

raychevy · 02-09-2003, 07:37 PM

What can I expect from a 1978 3/4 ton, 4 wheel drive, 400 small block/ turbo ? Around 10 you think ? Also is a truck like that worth 1800, I dont know the miles or condition.

*1FaastC10* · 02-09-2003, 11:44 PM

Ray, i've got a '79 K20 that i'll sell ya right now for $1500. its a little rough, but runs and drives great. its got a flatbed on it, and a damn nice Western plow.

PHOENIX · 02-10-2003, 12:38 PM

I have a 1983 1/2 ton 2wd with a stock 350 (edelbrock qjet and manifold) with the granny gear 4-speed tranny. Im heavy on the gas and get around 11-14 mpg city. I do a little better on highway, but at slower speeds then normal because of the 1:1 final gear. I go about 60-75 and 75 is pushing it, rpms get to around 3500-4000, I dont like that.

02-09-2003, 06:10 PM	#1
raychevy Registered User Join Date: Jul 2000 Location: Evansville, Indiana USA Posts: 485	73 up standard vs auto on gas Ive been tossing around the thought of buying a 73 up thats 4wd. Maybe even a 3/4 ton 4*4. Is there a big difference in gas mileage on these between the two transmission types ? I prefer automatic for what I do, but a manual would be nice if it saved several miles to the gallon. Is it true that the 3/4 model uses several more mpg vs the 1/2 model ?

02-09-2003, 06:44 PM	#2
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	ive never noticed that much of a difference in the older trucks in mileage from half to three quarter tons either stick or automatic the three speed chevy desperately needs a fourth gear at high speed ( highway speed ) and it makes the gas mileage lag __________________ 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!!

02-09-2003, 07:06 PM	#3
TODDS 72 Not the nightly winner Join Date: Jul 2002 Location: CHARLEMONT MA.USA Posts: 763	my mileage is bout 12 on the highway/10 towing trailer thats loaded/6 or less plowing snow.....i don't think 3/4..1/2 ton makes much differance in the gas its how you drive it,or use it.. __________________ 72C10SWB BLUE 350/350 86K10LWB BLUE 5.7 700r4 7.5' fisher plow 93S10XCAB4X4 BLUE 4.3 4L60e 69gmc c10 v8 3 on the tree yellow 72k10 swb 350 3 on the tree green 86k15 swb5.0L 4spd brown

02-10-2003, 12:38 PM	#6
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	I have a 1983 1/2 ton 2wd with a stock 350 (edelbrock qjet and manifold) with the granny gear 4-speed tranny. Im heavy on the gas and get around 11-14 mpg city. I do a little better on highway, but at slower speeds then normal because of the 1:1 final gear. I go about 60-75 and 75 is pushing it, rpms get to around 3500-4000, I dont like that. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

02-09-2003, 07:37 PM	#4
raychevy Registered User Join Date: Jul 2000 Location: Evansville, Indiana USA Posts: 485	What can I expect from a 1978 3/4 ton, 4 wheel drive, 400 small block/ turbo ? Around 10 you think ? Also is a truck like that worth 1800, I dont know the miles or condition.

02-09-2003, 11:44 PM	#5
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	Ray, i've got a '79 K20 that i'll sell ya right now for $1500. its a little rough, but runs and drives great. its got a flatbed on it, and a damn nice Western plow.



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