454 vs 350 gas mileage - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 02-27-2003, 06:08 PM Thread Starter
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454 vs 350 gas mileage

What type of difference would I be getting from a 454 or a 350 in gas mileage. say 35's, 4:10's, but is a 454 going to get alot worse gas mileage or just a little worsE?
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post #2 of (permalink) Old 02-27-2003, 06:13 PM
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Re: 454 vs 350 gas mileage

there will be a bit ofa difference prolly, but nothing to severe. i mean c'mon. 6,000 pound truck, lift, tires and waht not...one or 2 miles per gallon difference wont break you.
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post #3 of (permalink) Old 02-27-2003, 07:44 PM
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Re: 454 vs 350 gas mileage

454 will get worse to a 350 lifted, but not too much less. lets say 1-3 mph gallon less.

The higher the ride, the better head. [img]images/graemlins/RockOn.gif[/img]

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post #4 of (permalink) Old 02-27-2003, 07:57 PM
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Re: 454 vs 350 gas mileage

Depends on the truck, the bigger it is the closer it will be. Willys got better mileage in his crew cab 454 before he lifted it than I do with my reg cab 350. Either way I wouldn't expect much more than 12mpg if it's lifted with 35's...
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post #5 of (permalink) Old 02-27-2003, 09:39 PM
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Re: 454 vs 350 gas mileage

Now wait a minute, wouldn’t a 454 be more efficient than a 350? Because it would be easier to get a truck movin with a 454 rather than a 350, and a hell of a lot easier than a 305 [img]images/graemlins/frown.gif[/img]. Right?
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post #6 of (permalink) Old 02-27-2003, 09:50 PM
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Re: 454 vs 350 gas mileage

That would be true but it's easier because you're blowin up more air and fuel for more power [img]images/graemlins/grin.gif[/img]
post #7 of (permalink) Old 02-27-2003, 09:58 PM
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Re: 454 vs 350 gas mileage

That sounds good but no. A 454 motor takes more fuel to run because it is a greater cubic inch then a 350. Meaning bigger cylinder, bigger pistons, more fuel needed. A stock 454 on a pickup with stock tires, Run about 8 miles to the gallon loaded or unloaded.
post #8 of (permalink) Old 02-27-2003, 09:58 PM
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Re: 454 vs 350 gas mileage

Hmm I don't have any numbers for you but I would say bad for a 350 and worse for a 454.. But you'll have more fun burnin that gas with a 454 [img]images/graemlins/laugh.gif[/img]
post #9 of (permalink) Old 02-27-2003, 10:22 PM
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Re: 454 vs 350 gas mileage

Thanks for clearing that up. I wasn't aware that a 454 was a bigger engine than a 350. It takes a lot more throttle to get a small block truck moving, so the difference usually isn't that great. If you are bashing around with your foot to the floor, then yeah the 454 is going to use a lot more gas. A fuel injected truck with OD and stock tires will get closer to 12 mpg, not 8, which is about what a small block truck gets. This has been covered before, more than once. [img]images/graemlins/chairfall.gif[/img]
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post #10 of (permalink) Old 02-27-2003, 11:18 PM
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Re: 454 vs 350 gas mileage

Got to throw the [img]images/graemlins/bs.gif[/img] on that one. I have a 97 with a 454, 4 speed auto, stock size tires, and when I drove to Colorado with it, I was getting about 14-15 mpg, doing 70. My truck gets better mileage than the old mans Dog, er Dodge with a 360. If you keep your foot off the pedal, gas isn't as bad as people think. Just my two bits...... [img]images/graemlins/grin.gif[/img]
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