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09-11-2007, 07:35 PM
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#1 |
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Registered User
Join Date: Sep 2007
Location: new hope,al
Posts: 4
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newbie here with ? about gas mileage
hello everyone love this site still learning the ropes on here so
dont bash me i will be getting my grandfathers 1973 gmc truck lwb I6 auto "not for sure which I6 it is" anywho i was wondering the avg gas mileage on this truck it is in great running shape papa said so any help would be great thanks up front 
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09-11-2007, 09:00 PM
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#2 |
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The Crazy Machanic
Join Date: Jan 2007
Location: Nokesville Va
Posts: 1,437
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Re: newbie here with ? about gas mileage
well i have an 1986 with a 350 and she get around 13. i beileve that about average for these trucks. Now if you had a 305 and 2 something rear end gear your mpg will go you your transmission mostlikly is a th350.
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*1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day) * 1970 chevelle 2dr sedan Latest update June 24 2007.  *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad)  newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one
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09-11-2007, 09:29 PM
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#3 |
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Registered User
Join Date: May 2007
Location: Moore, Oklahoma
Posts: 2,396
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Re: newbie here with ? about gas mileage
Scooby Doo is probably pretty close -- i would not be surprised if it got as bad as 10, or as good as 13 or 14 and anything in between. The type of auto and the rearend gear ratio will affect this somewhat. A lot of times, the factory put steep rearends in the I6 trucks to boost the torque, but it would not make sense to put a heavy duty th400 back there, so it is prob a th350 (unless its a 'glide -- but i dont even know if those were available anymore in 73
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09-11-2007, 10:16 PM
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#4 |
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The Crazy Machanic
Join Date: Jan 2007
Location: Nokesville Va
Posts: 1,437
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Re: newbie here with ? about gas mileage
i dont think the glides were either and i know that finding a cast iron one is damn near impossible.
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*1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day) * 1970 chevelle 2dr sedan Latest update June 24 2007. *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad) newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one
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09-11-2007, 10:46 PM
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#5 | |
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Wishin' I had more money!
Join Date: Feb 2007
Location: Eugene, OR
Posts: 1,242
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Re: newbie here with ? about gas mileage
Quote:
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09-12-2007, 09:18 PM
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#6 |
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Registered User
Join Date: Sep 2007
Location: new hope,al
Posts: 4
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Re: newbie here with ? about gas mileage
yeah thanks guys i can't wait to get it and start fixing it up i will be getting a 72 nova with a I6 ans a powerglide later on as well it is a two door but brown on black a very basic car but runs great
and again i thank you guys for the help
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09-13-2007, 12:09 AM
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#7 |
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Chevys Kick A$$
Join Date: Jan 2005
Location: Zootown, MT
Posts: 12,699
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Re: newbie here with ? about gas mileage
I going to say somewhere around 12 or 15 depending on wats all running good or not.
__________________
*HOODS is what I answer too* -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold  -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit  -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER  I would rather push a Chevy then drive a ford!!
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09-13-2007, 12:12 AM
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#8 |
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Dark Heart Motorsports
Join Date: Apr 2007
Location: 29404 DKFX
Posts: 683
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Re: newbie here with ? about gas mileage
if u do a crap load of performance stuff like me...you'll get 6-8 depending on wind and slope
__________________
How Deep Can YOU Bleed..? 1985 Chevy Blazer K5- 6.2 N/A, 400 turbo trans CUCV, 12v converted... a new chapter 2005 GMC Sierra Crew Cab 6.0 powwwaa!!! custom jumpseat install w/ captain seats, Hypertech tuner, MSD Blaster Coils, CB and twin antenna's, all electric interior, touch screen in dash. custom center console, with jump seat replacing original console. 1500 HD! |
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09-13-2007, 11:28 AM
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#9 |
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Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: newbie here with ? about gas mileage
My guess would be a 292 strait 6, th350, something around a 3.42 gear. I would estimate mid teens for gas mileage.
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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09-13-2007, 09:09 PM
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#10 |
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Registered User
Join Date: Sep 2007
Location: new hope,al
Posts: 4
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Re: newbie here with ? about gas mileage
rock n roll guys thanks for all the help and input this site rocks
you guys are a great help hope i can help you guys and others soon aswell
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