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07-21-2009, 02:43 AM
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#1 |
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78 Big10 454
 
Join Date: Jul 2008
Location: Pismo Beach, CA
Posts: 842
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Re: What's your fuel Mileage?
Stock 454 with a TH400:
10 mpg on a good day. 10 mpg on a bad day 10 mpg highway. 10 mpg city. 10 mpg empty. 10 mpg loaded. Did I miss anything? Last edited by 78 Big10 454; 07-22-2009 at 01:17 AM. |
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07-21-2009, 12:20 PM
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#2 | |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,296
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Re: What's your fuel Mileage?
Quote:
K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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07-21-2009, 09:01 PM
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#3 | |
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Registered User
Join Date: Jul 2005
Location: Saskatchewan
Posts: 189
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Re: What's your fuel Mileage?
Quote:
I can get 18 or so if I drive like a citizen. With the 3.07 gear and the OD the engine only runs 1600 at 62 mph (100km/h), so I usually run about 1800-1900 at that's 70-73 mph. That's with the converter locked up and no winds. Sounds silly, but a little wind here is 25 mph +.
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Stu- 1981 GMC Sierra Classic LWB 355- original 2 bolt block, 10.2:1, vortec heads, Comp XE268 cam, built by self in 1992 700R4-2000 stall with lockup, shift kit, Corvette servo 3.07 open diff- I need a 3.73 posi! 2nd owner since 1986 - 388,000 km and counting. 100k by the first owner and the rest by me. Last edited by olblue81; 07-21-2009 at 09:12 PM. |
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07-21-2009, 09:13 PM
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#4 |
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Cradle Robber
Join Date: May 2009
Location: Lily Lake,Illinois
Posts: 774
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Re: What's your fuel Mileage?
Iget around 9mpg,less when my foot get's heavy
90 jimmy,mild 350,tbi,33" tires and 4.10 gears
__________________
"The problem with the world is that everyone is a few drinks behind." Humphrey Bogart "Hippies.They're everywhere.They wanna save the earth,but all they do is smoke pot and smell bad."Eric Cartman "Think about how stupid the average person is,and realize half of them are stupider than that."George Carlin |
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07-21-2009, 09:15 PM
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#5 |
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Registered User
Join Date: Oct 2008
Location: Lenoir,NC
Posts: 159
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Re: What's your fuel Mileage?
My 1989 TBI 1/2 ton Suburban 2wd,I get 15-16 going back and forth to work,taking it easy.My crewcab Dually,with 30 over 454,with towing cam,turbo 400w/ 4:10,Im getting about 9.5 empty,7.3 towing.My 2wd 4 banger Sonoma 5sp gets 28-30 driving to work and back
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07-22-2009, 12:31 AM
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#6 | |
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Registered User
Join Date: Apr 2009
Location: Waynesfield Ohio
Posts: 1,991
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Re: What's your fuel Mileage?
Quote:
 sorry had to do it Mine is a 454/rv cam/10 to 1 heads/600 eddy/th400/4:10 gears and like you it's only 6 mpg all the time no mater what I am using the old girl for.
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 1949 Five Window, 1973 Step Side, 2000 Z71 |
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08-10-2009, 11:34 PM
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#7 | |
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What Hump?
Join Date: Apr 2003
Location: New River AZ
Posts: 2,009
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Re: What's your fuel Mileage?
Quote:
10 mpg uphill 10 mpg downhill
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Lil red 86 c-10 99 Sub 78 Camper Special w/ 454 |
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08-14-2009, 11:59 AM
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#8 | |
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Registered User
Join Date: Mar 2009
Location: MD
Posts: 417
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Re: What's your fuel Mileage?
Quote:
__________________
2006 Silverado Crew Cab 1500 4x4 5.3L automatic 1986 M1008 CUCV 6.2L Detroit Diesel TH400 4.56 Detroit Locker rear NP208 1973 K20 "Silverado" 350ci, HEI, TH350, NP203 with 2wd conversion, A/C, power windows,tilt wheel, dual tanks. My '73ish K20 thread My 5yo son claims it as his. 1987 V20 Custom Deluxe 350 TH400 NP208 "farm truck" getting parted out. 2016 Nissan Altima grocery getter/commuter |
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08-14-2009, 12:34 PM
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#9 | |
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3/4 Ton Rodder
Join Date: Jan 2009
Location: Manlius, IL
Posts: 1,146
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Re: What's your fuel Mileage?
Quote:
10 mpg at night. Mine, if I did the math right, I get about 12 mpg with my 350 Quadrajet TH400. That is, if I can keep my foot out of it.
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1981 Chevy Scottsdale C20 "Orange Crush": SOLD 1989 Chevy Silverado K2500: All Stock (For Now), 350 TBI/700R4. DD/Light Duty Toy. |
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08-16-2009, 04:55 AM
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#10 |
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Registered User
Join Date: Jan 2009
Location: phoenix,AZ
Posts: 451
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Re: What's your fuel Mileage?
72 3/4 intl 2wd 3.73 3speed auto 9-10 if im nice 8-9 with lead foot
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08-16-2009, 04:55 PM
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#11 |
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Registered User
Join Date: Jan 2008
Location: White Haven PA
Posts: 59
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Re: What's your fuel Mileage?
21 mpg highway
Stock 4.3 4v/th350c/2.73/26" tall tires
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1992 C1500 WT LWB 4.3TBI 700r4 4.10 limited slip= Work Truck 1986 C10 Custom Deluxe LWB 4.3-4V TH350C 2.73 ac cruise tilt= Cowboy Cadillac Last edited by larrystone; 08-16-2009 at 04:57 PM. |
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08-16-2009, 07:12 PM
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#12 | |
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72 BB C30 Super LongHorn
Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
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Re: What's your fuel Mileage?
Quote:
1973 Stock 454/TH400 Same results as above!!!
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72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS 
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08-17-2009, 02:26 PM
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#13 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: What's your fuel Mileage?
My 70 gets gallons per mile
 my burb averages 16. the pickup 13. The biggest and heviest of my trucks my dodge dually gets the best 19-22.
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08-17-2009, 02:28 PM
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#14 | |
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Registered User
Join Date: Aug 2009
Location: Albuquerque New mexico
Posts: 169
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Re: What's your fuel Mileage?
Quote:
Sounds like mine, 1978 454 stock but for a good air filter and it gets 10mpg no matter what the situation is!
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