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Old January 26th, 2019, 05:40 PM
jagarra jagarra is offline
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Join Date: Apr 2014
Location: Reno, NV
Truck: 1962 Custom Wideside SB
Age: 78
Posts: 250
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Default Re: Terrible gas mileage,

I am going to check a lot of stuff today. Ran some figures to see how things were changing.

original carb 337.3 miles used 41.4 gal average over that period 9.11 MPG
Best mileage 11.18, worse was 7.7 MPG

Holley 844 miles used 102.2 gals for an average of 8.25 MPG
Best was 11.4 on the first tank with the Holley
worse was 6.1 MPG as of the fill before the one yesterday.

looks like i have a lot of items to check to see what has changed.

One thing that pops out is the truck doesn't like pure gas, will see how is goes on this tank. Does pure gas evaporate faster? Truck sat unused for quite awhile before the bad MPG figures.
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