How many miles per gallon? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

YoSSI · 05-29-2003, 11:50 PM

How many gallons does an 87 GMC 1500 tank have. Its a duel tank, how much do they hold each?

Also, how many miles per gallon does a stock 305 engine get (fuel injected). Approximently?

79BIG10 · 05-30-2003, 02:05 AM

the tanks on a short bed will hold 16 gal each and a long bed will hold 20 gal. Sometimes you will see a 16 gal on a LWB but not very often.

On the FI 305 no idea. Depends on tranny and rear axle ratio.

*rage'nrat638* · 05-30-2003, 09:15 AM

i get two gallons per mile

old_truck1969 · 05-30-2003, 10:05 PM

Although my 86 is a 3/4 ton, is has a 305. I get about 11 mpg in the city and about 13 on the highway

pkbinplano · 06-01-2003, 07:36 PM

My lwb has 16 gal tanks

big_c_snow · 06-01-2003, 10:05 PM

My 1986 1/2 ton gets 10 mpg. 305, TH700R4, 3.73, 29" tires. It is worse than it sounds, since I live 30 miles from anywhere, and it takes premium and still pings. While I drive it like a 17 year old, i really don't think it should get this bad, should it? I need help, as I am going broke. Thanks!

onetoncrewcab · 06-02-2003, 03:42 PM

I got you all beat! (except marksdoor69 I guess) My 82 one ton crewcab 4x4 got all of 5-6 mpg doing 75. If I dropped it to 65, I usually got 8-9.

The worse was 3.8 mpg and that was pulling a trailer into a head wind. We had to go 600 miles like that. The truck only had one 20 gallon tank (the other one was disconnected). We'd leave the gas station and would hope we could see another one on the horizon. That trip sure sucked. We had to fill up every 60-75 miles.
Mike

05-29-2003, 11:50 PM	#1
YoSSI Stepsides Rock! Join Date: Apr 2003 Location: Bay area, California Posts: 127	How many miles per gallon? How many gallons does an 87 GMC 1500 tank have. Its a duel tank, how much do they hold each? Also, how many miles per gallon does a stock 305 engine get (fuel injected). Approximently? __________________ 1987 GMC Sierra Classic Stepside. 305, Flows, more mods in the future.... http://www.cardomain.com/id/yossi316

05-30-2003, 02:05 AM	#2
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,775	the tanks on a short bed will hold 16 gal each and a long bed will hold 20 gal. Sometimes you will see a 16 gal on a LWB but not very often. On the FI 305 no idea. Depends on tranny and rear axle ratio. __________________ 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

05-30-2003, 10:05 PM	#4
old_truck1969 Registered User Join Date: Mar 2001 Location: Thunder Bay, Ontario, Canada Posts: 202	Although my 86 is a 3/4 ton, is has a 305. I get about 11 mpg in the city and about 13 on the highway __________________ "All Corvettes are red. The rest are mistakes." - John Heinricy

06-01-2003, 07:36 PM	#5
pkbinplano pkbinplano Join Date: Nov 2002 Location: Plano Texas Posts: 370	My lwb has 16 gal tanks __________________ http://www.picturetrail.com/gallery/...7496&members=1 84 chevy silverado aka The Bananna Boat

06-01-2003, 10:05 PM	#6
big_c_snow Registered User Join Date: Feb 2003 Location: Tampa, FL Posts: 157	My 1986 1/2 ton gets 10 mpg. 305, TH700R4, 3.73, 29" tires. It is worse than it sounds, since I live 30 miles from anywhere, and it takes premium and still pings. While I drive it like a 17 year old, i really don't think it should get this bad, should it? I need help, as I am going broke. Thanks! __________________ 94 Ford Aerostar AWD Which is useless in Florida... 86 FJ1200 Daily Driver

05-30-2003, 09:15 AM	#3
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	i get two gallons per mile

06-02-2003, 03:42 PM	#7
onetoncrewcab One of my kids. Cute eh? Join Date: Oct 2001 Location: Mitchell, SD Posts: 1,286	I got you all beat! (except marksdoor69 I guess) My 82 one ton crewcab 4x4 got all of 5-6 mpg doing 75. If I dropped it to 65, I usually got 8-9. The worse was 3.8 mpg and that was pulling a trailer into a head wind. We had to go 600 miles like that. The truck only had one 20 gallon tank (the other one was disconnected). We'd leave the gas station and would hope we could see another one on the horizon. That trip sure sucked. We had to fill up every 60-75 miles. Mike __________________ If a kid asks where rain comes from, I think a cute thing to tell him is “God is crying.” And if he asks why God is crying, another cute thing to tell him is “Probably because of something you did. John 3:16 2006 Chevy HHR 2000 Dodge Durango 1985 Jeep CJ-7 1970 Chevy Pickup



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