What kind of MPG are you getting? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

manimal · 03-14-2007, 08:57 AM

I have a '72 Cheyenne 20 with a 402,TH400,Dana 60 (dont know the gears though),and I checked the MPG yesterday,15.68! How is that possible!?! I drive 70 mph and have had the a/c on at times. Anyone else getting this kind of MPG?
-Lance

**special-K** · 03-14-2007, 09:06 AM

Do these trucks come with a mileage option?I`ve never had one.

67ChevyRedneck · 03-14-2007, 09:12 AM

Have you checked your speedometer to see if it's correct? Mine is off by 9%.

With the mileage corrected I get about 13 mpg with a 700R4 and 3.73. 15-16 hwy, depends on how fast I want to go

manimal · 03-14-2007, 09:17 AM

Yeah I have had it checked. Just seems too good to be true for a BBC.
-Lance

cruiserman · 03-14-2007, 09:19 AM

I would be very surprised if you're getting 15MPG with a 402 and TH400. I get 11 on good days with mine.

jacobs · 03-14-2007, 09:33 AM

If the carb is jetted a little lean, you can squeeze an extra 10% in milage. It's possible to get 15 mpg but generally you have to drive with a VERY light foot and keep speeds below 60.

**breeh** · 03-14-2007, 11:20 AM

You should have a 3.54 gear set in the rear. I get 10 MPG in my 4wd 427 uphill, downhill, tail wind, head wind, you get the picture

Longhorn Man · 03-14-2007, 02:26 PM

only 3.26% of the responding board members on this poll have your luck... and I'll bet a punch in the balls they don't have a big block or get that kinda MPG at your speed.
http://67-72chevytrucks.com/vboard/s...d.php?t=172346

ToddSS · 03-14-2007, 03:22 PM

Much better MPG now that the primary metering rods are unstuck.

**Already Gone** · 03-14-2007, 04:25 PM

Quote:

Originally Posted by manimal

I have a '72 Cheyenne 20 with a 402,TH400,Dana 60 (dont know the gears though),and I checked the MPG yesterday,15.68! How is that possible!?! I drive 70 mph and have had the a/c on at times. Anyone else getting this kind of MPG?
-Lance

Sounds to me like you had a tail wind and were going downhill when you burnt that tank of gas !!

jimmydean · 03-14-2007, 04:27 PM

14, no matter what.

ghackett1 · 03-14-2007, 04:35 PM

Man, I have a factory 402 in my 71 pick up with a turbo 400 and even is I stay out of the gas with the factory qjet I think I can watch my gas gauge go down! Glad to hear someone else is not experiencing that with gas prices the way they are.

snj8198 · 03-14-2007, 04:46 PM

Im getting 13 w/ my EFI 496, NV4500, D60/14B, 4.11's and 33's. I pretty happy with it!

timcos · 03-14-2007, 05:02 PM

Move the decimal point back on the gallons you are buying...should bring it back in line.

Math error...LOL

350/350 Q-Jet K10 big tires (31x10.5)(OK not huge but too big for me.) - about 10 MPG

Cochise · 03-14-2007, 05:31 PM

I am getting zero miles per gallon. The reason why...my speedo doesn't work.

sjarrett71 · 03-14-2007, 05:41 PM

Miles Per Gallon? More like Gallons Per Mile!!

dwaite72lnghrn · 03-14-2007, 05:59 PM

I would say check that every fillup and average it at the end of 10 fillups and tell us again what the mileage is. 1 fillup isn't a good reflection of true mpg. just my opinion.

Pyrotechnic · 03-14-2007, 06:12 PM

I wouldn't advertise that kind of mileage for that big of a truck. The oil cartels will come and rip the carburetor right off your engine.

724x4a/cchevy · 03-14-2007, 07:48 PM

i get about 12 in my 72. My stupid daily dirver 4 banger ranger only gets 17?? Half the weight, half the cylinders why not twice the mpg??

Oh well, it was free.

03-14-2007, 08:57 AM	#1
manimal Registered User Join Date: Oct 2006 Location: Southern Kalifornia Posts: 3,066	What kind of MPG are you getting? I have a '72 Cheyenne 20 with a 402,TH400,Dana 60 (dont know the gears though),and I checked the MPG yesterday,15.68! How is that possible!?! I drive 70 mph and have had the a/c on at times. Anyone else getting this kind of MPG? -Lance

03-14-2007, 09:06 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: What kind of MPG are you getting? Do these trucks come with a mileage option?I`ve never had one. __________________ "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 ~ Last edited by special-K; 03-14-2007 at 05:56 PM.

03-14-2007, 09:12 AM	#3
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: What kind of MPG are you getting? Have you checked your speedometer to see if it's correct? Mine is off by 9%. With the mileage corrected I get about 13 mpg with a 700R4 and 3.73. 15-16 hwy, depends on how fast I want to go __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

03-14-2007, 09:17 AM	#4
manimal Registered User Join Date: Oct 2006 Location: Southern Kalifornia Posts: 3,066	Re: What kind of MPG are you getting? Yeah I have had it checked. Just seems too good to be true for a BBC. -Lance

03-14-2007, 09:19 AM	#5
cruiserman Registered User Join Date: Dec 2006 Location: Idaho Posts: 210	Re: What kind of MPG are you getting? I would be very surprised if you're getting 15MPG with a 402 and TH400. I get 11 on good days with mine. __________________ 72 C2500 LWB 402 Sierra Grande 05 Odyssey 08 Tundra

03-14-2007, 09:33 AM	#6
jacobs Registered User Join Date: Sep 2005 Location: 9000' Mountain Man Posts: 326	Re: What kind of MPG are you getting? If the carb is jetted a little lean, you can squeeze an extra 10% in milage. It's possible to get 15 mpg but generally you have to drive with a VERY light foot and keep speeds below 60.

03-14-2007, 11:20 AM	#7
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Re: What kind of MPG are you getting? You should have a 3.54 gear set in the rear. I get 10 MPG in my 4wd 427 uphill, downhill, tail wind, head wind, you get the picture __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

03-14-2007, 02:26 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: What kind of MPG are you getting? only 3.26% of the responding board members on this poll have your luck... and I'll bet a punch in the balls they don't have a big block or get that kinda MPG at your speed. http://67-72chevytrucks.com/vboard/s...d.php?t=172346

03-14-2007, 03:22 PM	#9
ToddSS Registered User Join Date: Feb 2007 Location: Farmington Hills, MI Posts: 28	Re: What kind of MPG are you getting? Much better MPG now that the primary metering rods are unstuck.

03-14-2007, 04:27 PM	#11
jimmydean Registered User Join Date: May 2005 Location: Beaverton, OR Posts: 3,728	Re: What kind of MPG are you getting? 14, no matter what. __________________ New Project: 1966 LWB C20 Plans: 1/2 ton conversion Dropmember front Dropmember rear Corvette discs Restored raised bed http://67-72chevytrucks.com/vboard/s....php?p=4295210

03-14-2007, 04:35 PM	#12
ghackett1 68 C10 Longbed Join Date: Sep 2006 Location: Naples, Florida Posts: 520	Re: What kind of MPG are you getting? Man, I have a factory 402 in my 71 pick up with a turbo 400 and even is I stay out of the gas with the factory qjet I think I can watch my gas gauge go down! Glad to hear someone else is not experiencing that with gas prices the way they are.

03-14-2007, 04:46 PM	#13
snj8198 Registered User Join Date: Feb 2007 Location: Star Valley, WY Posts: 2,038	Re: What kind of MPG are you getting? Im getting 13 w/ my EFI 496, NV4500, D60/14B, 4.11's and 33's. I pretty happy with it!

03-14-2007, 05:02 PM	#14
timcos Chief Honcho In Charge Join Date: Aug 2006 Location: Bentonville AR Posts: 970	Re: What kind of MPG are you getting? Move the decimal point back on the gallons you are buying...should bring it back in line. Math error...LOL 350/350 Q-Jet K10 big tires (31x10.5)(OK not huge but too big for me.) - about 10 MPG __________________ 1992 1500 4x4 Shortbed 1984 Ford F250 Supercab Longbed 6.9L Diesel 1972 K10 Cheyenne Super Fleetside Short Bed - 350 - A/C 1971 VW SuperBeetle 1960 Wife 1984 Son 1986 Son 1989 Son Previous Trucks 1967 C10 SWB (1980-1981) 1971 C10 LWB (1998-2004) Last edited by timcos; 03-14-2007 at 05:02 PM.

03-14-2007, 05:31 PM	#15
Cochise Junior Member Join Date: Apr 2006 Location: Rogers, AR Posts: 298	Re: What kind of MPG are you getting? I am getting zero miles per gallon. The reason why...my speedo doesn't work.

03-14-2007, 05:41 PM	#16
sjarrett71 Registered User Join Date: Dec 2006 Location: Rolla, MO Posts: 2,463	Re: What kind of MPG are you getting? Miles Per Gallon? More like Gallons Per Mile!! __________________ -Scott-



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03-14-2007, 05:59 PM	#17
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Re: What kind of MPG are you getting? I would say check that every fillup and average it at the end of 10 fillups and tell us again what the mileage is. 1 fillup isn't a good reflection of true mpg. just my opinion. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

03-14-2007, 06:12 PM	#18
Pyrotechnic Registered User Join Date: Feb 2007 Location: Austin, TX Posts: 3,930	Re: What kind of MPG are you getting? I wouldn't advertise that kind of mileage for that big of a truck. The oil cartels will come and rip the carburetor right off your engine.

03-14-2007, 07:48 PM	#19
724x4a/cchevy Self-proclaimed LED man Join Date: Nov 2003 Location: Harrisburg, Missouri Posts: 1,021	Re: What kind of MPG are you getting? i get about 12 in my 72. My stupid daily dirver 4 banger ranger only gets 17?? Half the weight, half the cylinders why not twice the mpg?? Oh well, it was free. __________________ My LED Website My Photobucket Album of LED's Ask me about hand-made custom L.E.D brake and reverse lights. <- LINK I also do LED: -Third Brake/Cargo -Brake (truck and burb) -Reverse (truck and burb) -67-68 Front Turn Signals -69-70 Front Turn Signals -71-72 Front Turn Signals -GMC Front Turn Signals I can also do custom lights for other vehicles....i did a set for a AMC Gremlin once Norwood Survivor

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