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02-16-2011, 12:14 AM
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#1 |
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Registered User
Join Date: Jan 2011
Location: Marysville, Kansas
Posts: 82
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Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
what are ya'lls pickup gettin for fuel millage these days! Post Post Post!!!
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67 Chevrolet K20 72 Chevrolet K20 13 2500HD Chevrolet Duramax 4x4 LTZ Z71 |
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02-16-2011, 12:24 AM
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#2 |
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Registered User
Join Date: Jun 2000
Location: Festus, Missouri
Posts: 1,005
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
i think we estimated on the trip to kc my truck with 305 4 barrel serpentine setup with electric fans oh and 2wd was getting 16 mpg
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*SOLD* 1968 Chevy SWB Fleet 350/350 combo Tach/tilt/buddy buckets Bagged/18" Wheels Black on Black  Project "Pandemic" the Farm Rat 1927 Chevy Capitol Truck Rat rod '30 Model A Frame Dual Carb 5.3 LS http://www.67-72chevytrucks.com/vboa...d.php?t=804162 2007 GMC 4 DOOR 2WD BUILT 5.3 STAGE 3 CAM 93 TUNE LIFTED 22X12 WHEELS 33" TIRES 2023 Jeep RENEGADE Wifes ride |
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02-16-2011, 12:25 AM
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#3 |
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Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
Its been years since i figured it but average about 8.
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Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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02-16-2011, 12:48 AM
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#4 |
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Senior Member
 
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,976
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
72 4wd SB350/TH350 - I get about 10.5, 12 if I'm really nice, but I'm not often that nice.
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02-16-2011, 12:55 AM
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#5 |
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Sheetmetal Psycho
Join Date: May 2005
Location: athens PA
Posts: 515
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
When I drive nicely, 10-12 mpg. My normal driving? I can almost see the gauge move sometimes. Last trip of 76 miles cost me 15 gal (5 mpg). Great around town, but it ain't going on long trips anytime soon!
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I didn't say you were stupid, but I was thinking it... I need a check up from the neck up! Project "Rigginstine's Monster" 1971 C-10 longbed 355/4spd Future mods: 67 front clip Webby's Rigginations - where everything has potential! |
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02-16-2011, 01:15 AM
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#6 |
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Registered User
Join Date: Oct 2010
Location: Kansas City
Posts: 3,590
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
72 350/350 -- I've been getting 11 highway or otherwise.
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Willie Swamp Angel Truckers '72 C10 Highlander  People who blindly follow a GPS end up on television programs on The Weather Channel. Some survive, some don't. 
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02-16-2011, 01:25 AM
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#7 |
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Registered User
Join Date: Jul 2010
Location: Valencia, CA
Posts: 364
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
Sometimes it's good not to know
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02-16-2011, 01:45 AM
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#8 | |
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Senior Member
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,373
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
Quote:
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A husband can be right...or...A husband can be happy. 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc   JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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02-16-2011, 02:18 AM
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#9 |
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Senior Member
Join Date: Jul 2010
Location: South Dakota
Posts: 4,093
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
When im done with it im hoping around 20
but im keeping it stock except for a few things to get it better mpg.
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1969 Chevy c20(Miss Hackjob) |
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02-16-2011, 02:47 AM
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#10 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
I'd be lucky if I was gettin' around 7 or 8.
Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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02-16-2011, 03:04 AM
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#11 |
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Registered User
Join Date: Jul 2010
Location: SE Washington state
Posts: 80
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
9 or 10 on a good day. These things were made when gas was cheep!
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02-16-2011, 07:38 AM
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#12 |
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Registered User
Join Date: Jun 2010
Location: Jefferson, MD
Posts: 2,397
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
Not sure why, but my 3.73 350 truck is hitting about nine in the winter. I was up as high as 13 last summer.
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'68 Dodge Dart 270, 225, 904, 2.76--"Lucy" 1996 Gmc 1500 Z71, 350, 4l60e, 3.73s 1995 Jeep Wrangler Rio Grande 2.5, AX5, 4.10s 1989 Toyota Pickup 22re, auto, 3.73 |
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02-16-2011, 07:48 AM
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#13 |
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Registered User
Join Date: Dec 2010
Location: Arkansas
Posts: 608
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
2wd + 4.10's +600 Holley+ 305 worn out=12 mpg.
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02-16-2011, 09:25 AM
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#14 |
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Special Order
 
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
My '72 K2500 350/TH350 w/3.54:1 gears gets 12.5 mpg consistently with the country road/hiway combo I normally drive. I haven't checked since I took the 12.50/33s off and went back to the stock 235/85s,but I doubt it changed much. It gets better mileage than the '89 K1500 350TBI/700r4 w/lame crazy-tall gears that I've been driving this winter. My old '72 K/20 Highlander 400SBC/4spd w/4.10s & 12.50/35s got 12.5 mpg,too. It seems odd but I check both '72s over and over. It had so much torque and the manual giving total lock-up that I could run it along with hardly any throttle. I only ran it at about 60-65 mph on the hiway.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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02-16-2011, 09:29 AM
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#15 |
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Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
I've kept track since the day I bought it.
4x4, 350 with 3-speed manual that was slowly converted to a 383 with th350. 3.73 axels. Best ever was 13.5 (350 engine, 3-speed manual) Now with the slush box and 383 I get 9.5 all day long. In the winter I get 3-5 mpg but that is only one tank that usually lasts from November to March. This year with all the snow I had to throw 12 gallons out of jerry cans in (I don't drive it on the salty roads). I may be looking at a new all time low. 
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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02-16-2011, 09:39 AM
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#16 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
1970 stepside 2 WD. 350 engine, 700r4 trans., 3.08 rear end, Q-jet carb & HEI. I get 16 mpg combination & 18 down the road. I was shooting for 20 but just can't get there.
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02-16-2011, 09:56 AM
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#17 | |
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Registered User
Join Date: Feb 2010
Location: Southern California
Posts: 543
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
Quote:
Posted via Mobile Device Posted via Mobile Device
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Doug '72 GMC K2500 Suburban 4x4 |
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02-16-2011, 10:33 AM
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#18 |
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It's all in the timing
Join Date: May 2009
Location: Lake Mary,Florida
Posts: 600
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
307,4 barrell,3.73 gears and a 3 speed avg. about 8-10mpg.Thats why I drive a 4 banger for my 75 mile round trip commute,32mpg.
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The Dude Abides. ---------------------- I aint sayin, I'm just sayin. |
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02-16-2011, 11:17 AM
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#19 |
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The Older Generation
Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,772
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
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My '67 shortie 454/th350 is averaging 12 since I put the 3.07 rear in it... Rebuilding the Q-jet made a difference too. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 02-16-2011 at 11:19 AM. |
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02-16-2011, 11:23 AM
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#20 |
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Registered User
Join Date: Jan 2011
Location: Marysville, Kansas
Posts: 82
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
id like to get a 454 for my picup but leaning more on the side of getting the 4 speed..also i have a 4.56 gear ratio and a 350 the gears kill my fuel, i dont know what its getting for milleage but its not extremely bad. another thing id say is change my gears over from 4.56 to 3.73 just wondering how it would do then.
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67 Chevrolet K20 72 Chevrolet K20 13 2500HD Chevrolet Duramax 4x4 LTZ Z71 Last edited by Hlindeen; 02-16-2011 at 11:24 AM. |
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02-16-2011, 11:26 AM
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#21 |
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Registered User
Join Date: Feb 2007
Location: Cali Central Coast
Posts: 5,191
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
With all these numbers, a variable to throw out is your odometer - if you are using that, make sure it's accurate, because mine's about 20 percent off. (I'm gonna fix that some day...)
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'67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD  Click here to support the board Philippians 4: 6-7 |
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02-16-2011, 11:26 AM
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#22 |
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Registered User
Join Date: Oct 2009
Location: Phoenix, AZ
Posts: 475
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
350 with Edelbrock and headers/TH350/3.07 rear end and 31" tires gets about 12 on the highway at 70 - 75 mph. Less around town - I'm guessing 10.
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1971 C10 Longbed, 350/TH350 |
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02-16-2011, 11:41 AM
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#23 |
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Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,705
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
I'm an official member of the 10/12 club. And worse when I pull the boat. I've got the 3.55 Posi rear axle sitting in front of the garage waiting to do the swap from the 4.11 in there now but that is also part of the swap to the Cad 500 and turbo 400 package that is waiting to be dropped in.
The 70 with a 307, power pack heads, cast iron intake and spread bore Holley with 3.73 Gears and four speed got 16 on the road going to Texas. It got about 12 coming back with a loaded 16 foot stock trailer behind it. Last edited by mr48chev; 02-16-2011 at 11:45 AM. |
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02-16-2011, 11:52 AM
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#24 | |
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It's all in the timing
Join Date: May 2009
Location: Lake Mary,Florida
Posts: 600
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
Quote:
These old time gear driven speedos are not as accurate as the new electronic ones or as accurate as gps.I base mine on where I drive and knowing the mileage from point A to B.Just a weekend cruiser not a DD.
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The Dude Abides. ---------------------- I aint sayin, I'm just sayin. |
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02-16-2011, 12:28 PM
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#25 |
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Registered User
Join Date: Aug 2010
Location: Wausau, WI
Posts: 69
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
I took just over a 300 mile round trip at the end of the summer and averaged 11 mpg. Thats with a 4x4 LWB, 31" tires, 350/350 and a junky quadrajet. PO really cobbled things together with the carb so I'm hoping when I replace it soon it will give me some more power, more mpg or both.
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