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#1 |
Registered User
![]() Join Date: Oct 2006
Location: Southern Kalifornia
Posts: 3,066
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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 |
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#2 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: What kind of MPG are you getting?
Do these trucks come with a mileage option?I`ve never had one.
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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 ~ Last edited by special-K; 03-14-2007 at 05:56 PM. |
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#3 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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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 ![]()
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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! |
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#4 |
Registered User
![]() Join Date: Oct 2006
Location: Southern Kalifornia
Posts: 3,066
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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 |
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#5 |
Registered User
Join Date: Dec 2006
Location: Idaho
Posts: 210
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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.
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72 C2500 LWB 402 Sierra Grande 05 Odyssey 08 Tundra |
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#6 |
Registered User
Join Date: Sep 2005
Location: 9000' Mountain Man
Posts: 326
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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.
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#7 |
Recovering 67-72 Addict
![]() Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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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
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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" |
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#8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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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 |
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#9 |
Registered User
Join Date: Feb 2007
Location: Farmington Hills, MI
Posts: 28
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Re: What kind of MPG are you getting?
Much better MPG now that the primary metering rods are unstuck.
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#10 |
70+ ( Old Skool Club )
![]() Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,115
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Re: What kind of MPG are you getting?
Sounds to me like you had a tail wind and were going downhill when you burnt that tank of gas !!
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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#11 |
Registered User
Join Date: May 2005
Location: Beaverton, OR
Posts: 3,728
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Re: What kind of MPG are you getting?
14, no matter what.
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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 |
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#12 |
68 C10 Longbed
![]() Join Date: Sep 2006
Location: Naples, Florida
Posts: 520
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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.
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#13 |
Registered User
![]() Join Date: Feb 2007
Location: Star Valley, WY
Posts: 2,038
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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!
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#14 |
Chief Honcho In Charge
Join Date: Aug 2006
Location: Bentonville AR
Posts: 970
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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
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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. |
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#15 |
Junior Member
![]() Join Date: Apr 2006
Location: Rogers, AR
Posts: 298
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Re: What kind of MPG are you getting?
I am getting zero miles per gallon. The reason why...my speedo doesn't work.
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#16 |
Registered User
Join Date: Dec 2006
Location: Rolla, MO
Posts: 2,463
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Re: What kind of MPG are you getting?
Miles Per Gallon? More like Gallons Per Mile!!
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-Scott- |
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#17 |
Registered User
Join Date: Jun 2002
Location: central pa
Posts: 1,525
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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.
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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 |
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#18 |
Registered User
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
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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.
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#19 |
Self-proclaimed LED man
Join Date: Nov 2003
Location: Harrisburg, Missouri
Posts: 1,021
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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??
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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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