Thread: Gas mileage
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Old 06-08-2015, 07:15 AM   #5
special-K
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Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
Re: Gas mileage

A 4bbl will give you better mileage when cruising on the primaries. It will give more power and suck more fuel when taking on those hills. Worse mileage when you need the added power/better mileage the rest of the time. I am talking spread-bore 4bbl, such as came on these trucks.
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