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View Poll Results: What's your MPG?
Less than 7 MPG...I should own stock in the oil fields. 33 6.51%
7 to 9 MPG ... can I get some gas money please? 85 16.77%
10 to 12 MPG ... And I thought I had it bad...look at those suckers getting less! 197 38.86%
13 to 14 MPG ... Yeah... I'm doing OK 103 20.32%
15 to 17 MPG ... Heh...I'm doin better than the new trucks! 60 11.83%
18 to 20 MPG ... Why does everyone say B.S. when i tell them this???? 20 3.94%
20+ I am a compulsive lier and I am stoned. (j/k if anyone here actually DOES do this good.... or if you are a lier and a stoner and feel insulted) 20 3.94%
MPG... Whats that? I get KPL and it is so wierd that you americans never seem to be able to figure it out. 12 2.37%
Multiple Choice Poll. Voters: 507. You may not vote on this poll

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Old 09-10-2005, 09:25 PM   #1
Longhorn Man
its all about the +6 inches
 
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MPG poll

This has been discussed before, and I'm sure maybe even a poll... but I have no recollection of it so...
(you can vote more than once...since some of you have more than one truck)
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Old 09-10-2005, 09:37 PM   #2
Longhorn Man
its all about the +6 inches
 
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Also.... feel free to describe your rig's mechanicals... stock, mild, wild... inline, small block, big block, cross breed... stick shift, slush box, one to one, over drive... 4X4 4X2...blah blah blah...


Mine is a cross breed caddy 500 wearing an Edelbrock 750 on top with a one to one (TH350) slush box automatic with a 4.10 in the rear... I get 10 MPG.

Last edited by Longhorn Man; 09-10-2005 at 09:39 PM.
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Old 09-10-2005, 09:38 PM   #3
Longhorn Man
its all about the +6 inches
 
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Oh yeah...if you have a Fuel injection swap and you ARE actually getting 20+ on a regular basis.....please share that too!
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Old 09-10-2005, 09:47 PM   #4
Canadian694x4
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Voted 10 to 12. 69 4x4, 283 4bbl (Fresh Rebuild), TH350 (Coupled To A NP208), 3.73 Ratio?? Hmm...I should really get off my ass and check that...
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Old 09-10-2005, 10:06 PM   #5
al's71gmc
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I went with the 10-12. Last time I checked it was 11.5 mpg. But I haven't checked since going to the taller tires. Most of my miles are at highway speed so maybe I'm getting a little better? I also try to keep the speed to around 65 instead of 75-80. Of course my speedo is off some from going taller too....
Al

Hey Longhorn Man- I grew up outside of Cincinnati. Moved out west for good about 6 years ago.
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Old 09-10-2005, 10:15 PM   #6
Longhorn Man
its all about the +6 inches
 
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yeah, I'm planning a move out west too...where insanity meets the sea. (LA)
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Old 09-10-2005, 10:19 PM   #7
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voted 14. '69 GMC short step 4X2, 3.73 and 33's. all those RPM calcs are bull cuz it says i should be at 2700RPM at 60, where im at like 3K. but anyhow, i run a NP435GA. im gonna step down to somewhere 3.08 to 3.42 and a 29 or 28" tire
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Old 09-10-2005, 10:22 PM   #8
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i cant really vote if i keep my foot out of it i get right around 10 but as soon as i crack it open it starts drinking and quickly goes somewhere under 4 mpg at that point.
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Old 09-10-2005, 10:48 PM   #9
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The old longhorn is running an Edelbrock rpm topped 383,with a comp XE268 cam,400 turbo with a 2500 stall converter. all that runs through a set of 3.40 gears, on a 29" tall tire. 3000 rpm cruise on the hyway gets me right at 73 mph,& will go right at 10mpg ......if driven easy(thats a big IF at times tho ). L
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Old 09-10-2005, 10:51 PM   #10
Ironhorse
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I voted in the 10-12 mpg range. When I have the nerve to check it, usually comes in just a hair over 11-11.5 range. Stock 350, (not orginal to the truck) 2bbl, 4 speed, 4x4 with NP 205, 31-10.50's on rallies, 4:11 gears. Generally does best if I stay between 55-60 on the high way. Have to drive it like Grandpa, light foot, no speed shifting. (But then, how do you speed shift a granny 4 speed, )
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Old 09-10-2005, 10:58 PM   #11
pjmoreland
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16 MPG, 300HP 350, 700R4, 3.73 gears, 29in. tires, HEI, Edelbrock 1400 carb, Performer RPM intake, stock ramhorn manifolds.
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Old 09-10-2005, 11:04 PM   #12
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I get a little over 13. 307 with the stock 2bbl. 29" tires and 3.73 gears. Im looking to switch to 3.08 soon and hope to be over 15.
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Old 09-10-2005, 11:06 PM   #13
see ten
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I have gotten 14.75 out of my C10. That's in the left lane of the interstate with the A/C wide open. I have a 350 with an Edelbrock intake, underdrive pulleys, MSD coil and wires, roller tip rockers, K&N filter and filtered lid with a quadrajet. It has a turbo 350 trans and a 3.08 gear. I have also removed the engine driven fan and replaced it with an electric Flex-a-lite unit.
I have gotten a high 12 out of my K10. It is almost an identical setup with the addition of a 4x4 cam. It runs a 33x12.50 M/T claw and a 3.08 gear. It would probably pick up a mile or two per gallon with a less aggressive tire.
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Old 09-10-2005, 11:54 PM   #14
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I hope to be above 18-20 after I finish my swap.
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Old 09-11-2005, 12:39 AM   #15
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Voted 13-14. It's very unofficial. 99% highway miles and my odometer might be off.
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Old 09-11-2005, 01:06 AM   #16
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I wont vote this time cause my truck aint used a drop in a year but it used to get 10-12
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Old 09-11-2005, 01:46 AM   #17
72 CustomCamper
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72 C/20 built 400hp 396 700r4 trans 4:11 dana 60 rear don't remember what size tires but bigger than stock gets around 4 MPG.
Daily driver
86 K/10 stock 305 700r4 trans 3:08 10 bolt rears 31x10.50x15 tires gets around 8 MPG...


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Old 09-11-2005, 02:30 AM   #18
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68 SWB 350 RV cam/flat tops Torker intake 600 edelbrock stock turbo 350 has a 3.73 posi rear. get around 10-12 unless i feel like trying to put my foot through the firewall then it might get 5
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Old 09-11-2005, 03:13 AM   #19
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454, t350, np205, 1970 k/20, pulling a heavy trailer make no difference ! lol
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Old 09-11-2005, 03:28 AM   #20
gregbr
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I did a post like this about 4 months ago, got lots of got info, can't find it now. Anybody know how to search with google?

70 GMC C-10 SWB, 402/T400, 308 gears, (all factory stock) has 275-60-15's....about 10 mpg.

67 Chevy K10 SWB, built 350/T350, 373 gears, 33-10.50-15's....10 mpg.

94 Honda Civic, 1.5L auto.....32 mpg, sorry, I had to throw it in.


Both have the speedo's off a couple miles per hour at 55. Greg
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Old 09-11-2005, 03:40 AM   #21
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72 c10 lwb th 350 dont know my ratio probably gets 10-12 all the time

99 silverado gets a hair over 20 on the highway, i think something like 15 in town
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Old 09-11-2005, 06:08 AM   #22
LUV2XCLR8
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ENGINE

1970 LT1 BLOCK
1970 LT1 FORGED CRANK
1970 LT1 FORGED RODS
TRW FORGED PISTONS .030
MILODON OIL PAN
1970 LT1 CAMEL BACK HEADS, 2.02/1.60 3 ANGLE VALVE JOB,
HEADS HAVE BEEN EXTENSIVELY PORTED & POLISHED
LUNATI CAM 290?
LUNATI TIMING GEARS
HOLLEY DOMINATOR INTAKE
3310 HOLLEY CARB 750 CFM
MALLORY UNILIGHT DISTRIBUTOR
ALUMINUM WATER PUMP
HEADMAN ELITE CERAMIC COATED HEADERS
APPROXIMATELY 425 H.P.

THE REST

350 TURBO AUTOMATIC
NP205 TRANSFER CASE
3.08 GEARS FRT. & REAR
35 X 12.5 X 15 BFG'S

SHOULD GET 10-12 LIKE ASA SAID ABOVE (SEETEN)
BUT REALISTICALLY IT GETS LIKE 6-8, THIS MOTOR
MUST BE MORE OF A HOSS THAN THE PO STATES

(IT SHOULD GET GOOD GAS MILAGE BECAUSE OF THOSE
3.08 GEARS RIGHT? WRONG, THAT'S AN OLD WISE TALE)
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Old 09-11-2005, 09:13 AM   #23
TP from Cntl PA
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38 MPG with Mine..................And no, I am not a liar and I am not stoned!

One of the best choices I ever made was tossing that small block!
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Old 09-11-2005, 09:24 AM   #24
68 Stepside
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I think I got 120 miles per tank one time, and was happy with that What is that, 6-ish mpg? That was with a smogger 350, 3.73's and 29" tires. I'm sure the 406 is gonna be even worse.
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Old 09-11-2005, 10:24 AM   #25
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just went on a trip to athens and back ,a load of wood ,two 270 pound guys and running 70-15 mpg not to bad .tires are 235/75/15s
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