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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, 09:56 AM
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#9 | |
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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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#10 |
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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, 02:18 AM
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#11 |
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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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#12 | ||||
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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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#13 |
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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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#14 |
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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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#15 |
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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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#16 |
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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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#17 |
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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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#18 |
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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, 03:49 PM
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#19 | |
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Registered User
Join Date: Dec 2009
Location: Atlanta, Ga.
Posts: 1,050
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
Quote:
700R4 with 255x70x15 tires on the rear and a 3:73 is just about ready for some mileage tests. On paper it should be turning 2111 rpms at 70 mph. stay tuned, i'm hoping for 20 mpg. |
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02-16-2011, 11:26 AM
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#20 |
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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, 11:52 AM
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#21 | |
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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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#22 |
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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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02-17-2011, 11:42 AM
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#23 |
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Registered User
Join Date: Apr 2008
Location: bakersfield, CA
Posts: 61
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
I have a 2wd, BBC 402...just did the math on my last fill up and its 8.14 MPG. I think its better not to know, I don't like my thoughts of $$$ when I'm trying to enjoy driving my truck.
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71 Chevy C-20 Fleetside Stock 402 BB-Summit Headers-700R4 Trans Dual 40 series flowmaster w/ H pipe Edelbrock 2161 intake & 1411 Carb
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02-17-2011, 12:54 PM
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#24 |
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Registered User
Join Date: Nov 2010
Location: Greer SC
Posts: 187
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Re: Whats your 67-72 chevy 2wd or 4wd gettin on fuel millage?
My 72 with a 150,000 miles with a 350 and a/t gets 10 mpg.
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02-16-2011, 11:26 AM
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#25 |
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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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