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02-25-2013, 03:00 PM
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#1 |
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Registered User
Join Date: Mar 2012
Location: edgartown mass
Posts: 852
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fuel report
ok guys went on a trip to NH to get a truck that i now dont want lol. but anyway i used my k30 6.2 loaded i got 9.8mpg with my foot to the floor the hole time. dam she needs more power lol.
what are you guys geting out of your trucks?
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1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car |
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02-25-2013, 06:28 PM
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#2 |
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Registered User
Join Date: Oct 2011
Location: central Oregon
Posts: 1,225
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Re: fuel report
7.75 ....454.....empty.....i dont even wanna know what it is towing...
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88 3+3 454 400 205 410 drw to srw still in pieces 90 3+3 350 400 205 410 srw 84 1/2 ton lb 6.2 4x4 parts truck |
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02-25-2013, 07:52 PM
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#3 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: fuel report
Highway
1976 6.5 NA 5sp 4x4 17mpg 70mph M1008 6.2 NA TH400 4x4 11mpg 55mph max 2000 6.5 TD 5sp 2wd 21mpg 70mph I've gotten 23 but it's an outlier typically she runs 20-21. Town 1976 6.5 NA 5sp NP208 4x4 14mpg M1008 6.2 NA TH400 NP208 4x4 9-10mpg 2000 6.5 TD 5sp 2wd 18mpg LT265 70 R16 tires on all three The CUCV has 4.56:1 axles... According to my spreadsheet... at 55mph she tachs out at 2100. That sounds about right. At 65 she should be turning 2600 and it sounds like the engine is trying to climb out from under the hood. The other two have 3.73:1 axles. They tach out at roughly 2100 at 70mph. I think the CUCV needs a 4L80.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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02-25-2013, 08:32 PM
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#4 |
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Registered User
Join Date: Mar 2012
Location: edgartown mass
Posts: 852
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Re: fuel report
4l80e and a gear venders lol
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1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car |
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02-25-2013, 11:44 PM
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#5 |
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Registered User
Join Date: Dec 2012
Location: Preble county ohio
Posts: 1,914
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Re: fuel report
i get about 10 with mine, 454 th400 3.73 one ton crew
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02-25-2013, 11:50 PM
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#6 |
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Registered User
Join Date: Sep 2009
Location: Beaverton, OR from WA State
Posts: 1,515
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Re: fuel report
Just got 12.8 this weekend. Mostly highway, kept it under 65.
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Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96 |
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02-26-2013, 12:17 AM
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#7 |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: fuel report
I am about 5-10 city and 13hwy cruising at 3krpm at 60mph
Posted via Mobile Device
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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02-26-2013, 12:43 AM
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#8 |
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Registered User
Join Date: Jul 2011
Location: back 40, bc
Posts: 3,903
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Re: fuel report
'85 crew, 454, t400, 4:56's, 38.5 swamps.$200-$220 to fill both tanks, 200 miles to empty both tanks. around 180 in town
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02-26-2013, 01:22 AM
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#9 | |
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Registered User
Join Date: Dec 2012
Location: Preble county ohio
Posts: 1,914
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Re: fuel report
Quote:
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02-26-2013, 01:30 AM
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#10 |
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Registered User
Join Date: Jul 2011
Location: back 40, bc
Posts: 3,903
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Re: fuel report
ya, right now we're paying $1.29 a liter (frickin metric) & there's just over 4 liters in a gallon. same truck 15 yrs ago was $80-$90
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02-26-2013, 01:35 AM
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#11 |
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Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: fuel report
I'm
At 50$ a tank in premium to fill at $3.97 a gal. That's a good sack tap for you there Posted via Mobile Device
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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02-26-2013, 07:25 AM
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#12 |
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Registered User
Join Date: Feb 2007
Location: Memphis MI
Posts: 1,851
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Re: fuel report
Last summer I was getting 23mpg. 1987 R10 6.2 diesel NA 700R4 3.08. Mixed driving, 58 in country, 68 on highway, posted speed in city. Rear end is out right now and diesel is $4.25!
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1987 2 ton  1982 250/TH350 beater in progressDad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrappingPlus a mess o' tractors |
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02-26-2013, 02:03 PM
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#13 |
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Registered User
Join Date: Mar 2012
Location: edgartown mass
Posts: 852
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Re: fuel report
diesel here is 472 a gal. and regualr gas is 472 or better a gal. in my 86 i get 200 miles a tank. witch comes out to be 14mpg with a top speed of 45mph. my 85 i get 200 out of it for 50 bucks almost. 50-60 bucks depending on what i do.
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1986 c20 "the hillbilly" 350 sm465 3.42gears 21mpg at 70mph 1985 k30 "the ice cream truck from hell" no rust az truck 197-8??? c30 "ramp truck" 454 1978 monte carlo 350 350th with 2.73 gears. no rust. sc car |
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02-26-2013, 04:08 PM
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#14 |
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Registered User
Join Date: Mar 2012
Location: San Antonio, Tx
Posts: 784
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Re: fuel report
In my 74 shortbed 31 in tires 305/350 trans I get 10mpg that's street, don't get on the highway, so not sure on that number...
Posted via Mobile Device
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San Antonio, TEXAS -Frog -I'm a valet and well I've driven BMWs, Mercedes, Porsche,Bentlys, fiats, Hondas, etc and well even do I like a few features, I love my shortbed, it dosent bore me out, just press on the gas and you'll remember why you love it. |
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02-26-2013, 04:17 PM
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#15 |
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been here longer than Liz
Join Date: Feb 2000
Location: Broken Arrow, OK
Posts: 2,437
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Re: fuel report
89 TBI 350 K5, 700r4, 33x12.5x15, very tired 273k engine
full tank before last only netted me 9.62 mpg filled up last night and came up with 11.66 mpg No idea what was different. Prior to the 9.62 tank I'd overhauled the fuel system (new pump/sender/fuel filter/rebuilt TBI & new injectors) I have a new EGR valve to swap in, hoping that will help me some. I buy real gas, hovers over $3.60/gal here.
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~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 |
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02-26-2013, 09:14 PM
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#16 |
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Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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Re: fuel report
6.24 in town, 11.2 HWY last time I checked. '83 K20, mild 355, TH400, NP208, 4.10 gears, 38x15.50 MT Baja Claw Radials.
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Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 
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02-26-2013, 09:51 PM
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#17 |
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Registered User
Join Date: Feb 2012
Location: Big Valley. Alberta
Posts: 674
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Re: fuel report
The 81 454/400/205/4:10 on 33s around 7-8. 82 6.2/A833/208/3.73 6" lift on 35s around 15-16 on highway this winter,86 350/465/208/4.10 7" lift on 35s around 10-11. Not sure about the old C20,wife drives it mostly,just keep filling it up!!!
Posted via Mobile Device
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1977 Chev C30 454/465/14ff DRW 1974 Chev C20.350/465/14ff " Rock n Roll ain't noise pollution" 
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02-26-2013, 10:46 PM
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#18 |
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Registered User
Join Date: Dec 2012
Location: overland park, ks
Posts: 167
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Re: fuel report
don't want to know but seems as thought the 502 is always thirsty. just happy to have 2 tanks until it's time to pay..saw premium at $4.19 a gallon yesterday! still a fun ride when i drive it. may check some day.
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02-26-2013, 11:30 PM
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#19 |
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Registered User
Join Date: Mar 2012
Location: Little Rock, Arkansas
Posts: 770
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Re: fuel report
Ive never checked and probably won't. I know it's crappy so I just know I just put 20 bucks in at a time and that lasts about two days lol.
Posted via Mobile Device
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1979 Sierra Classic Heavy-half1996 Silverado x-cab "the daily" |
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