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86c20 02-25-2013 03:00 PM

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?

AntiGov 02-25-2013 06:28 PM

Re: fuel report
 
7.75 ....454.....empty.....i dont even wanna know what it is towing...:lol:

hatzie 02-25-2013 07:52 PM

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.

86c20 02-25-2013 08:32 PM

Re: fuel report
 
4l80e and a gear venders lol

meatwagon83 02-25-2013 11:44 PM

Re: fuel report
 
i get about 10 with mine, 454 th400 3.73 one ton crew

83GMCK2500 02-25-2013 11:50 PM

Re: fuel report
 
Just got 12.8 this weekend. Mostly highway, kept it under 65.

INSIDIOUS '86 02-26-2013 12:17 AM

Re: fuel report
 
I am about 5-10 city and 13hwy cruising at 3krpm at 60mph
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dieseldawg142 02-26-2013 12:43 AM

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

meatwagon83 02-26-2013 01:22 AM

Re: fuel report
 
Quote:

Originally Posted by dieseldawg142 (Post 5913344)
'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

daggone man! i thought mine was bad at about 140 a tank

dieseldawg142 02-26-2013 01:30 AM

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

INSIDIOUS '86 02-26-2013 01:35 AM

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
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D13 02-26-2013 07:25 AM

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!

86c20 02-26-2013 02:03 PM

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.

frog210 02-26-2013 04:08 PM

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...
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Low87 02-26-2013 04:17 PM

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.

Your41Plague12 02-26-2013 09:14 PM

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.

Rubble 02-26-2013 09:51 PM

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!!!
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zook 02-26-2013 10:46 PM

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.

GM-power 02-26-2013 11:30 PM

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.
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