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07-07-2005, 06:40 PM
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#1 |
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Registered User
Join Date: May 2004
Location: Saint Louis
Posts: 76
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Another oxymoron
Just wondering what m.p.g. are getting with a 454 in 2-wheel 1/2 ton truck???? Anyone ever mess with carb,timing,advance,overdrives, or bolt-ons to get better mileage with a 454??? I would love to get 13-14 m.p.g with a 3.40 gear
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07-07-2005, 11:08 PM
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#2 |
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Registered User
Join Date: Jun 2004
Location: Rosemount, MN
Posts: 341
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Drove from Mpls/St Paul area to 1 hour south of Sioux Falls, SD.
this past Sunday. 540 plus miles rt. "91 Suburban, 454 Auto, 3/4 ton two wheel drive. 130K miles. Don't know the rear gear. (Don't care either  )Got 14 mpg down and back, Cruise set on 65-70mph Last fall went to Chicago with an open trailer to pick up an '81 drag Camaro. Down, trailer-no car we got 12.8 mpg. On the way back with the Camaro we got 13.0. (We figured it must be more aerodynamic. Cruise at 75mph. Just my .02  CCDually
Last edited by GMC1tondually4dr; 07-07-2005 at 11:09 PM. |
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07-09-2005, 09:31 AM
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#3 |
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Registered User
 Join Date: May 2004
Location: Miss Co Arkansas
Posts: 679
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I have a '93 3/4 ton 4wd that I've got 14.5 on the interstate with. Just around town it's about 12. It has a standard trans with od.
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76/77/78 Cheyenne 1997 K3500 454 soon to be 496 |
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