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Gas mileage for a 5.4

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Old 06-30-2015, 02:47 PM   #1
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Default Gas mileage for a 5.4

I'm wanting to get an f150 but I'm having trouble finding any of the 4.6L that have reasonable miles and price. I've heard nothing good about the gas mileage the 5.4 tritons get, so here is my question. Is there any tuner/performance chip that makes any significant difference (4ish mpg) in the gas mileage?
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Old 07-01-2015, 03:14 PM   #2
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In my experience if you're buying a truck for mpg you shouldn't be buying a truck. With that said I think the best any tuner can boast is like a 2, maybe 3, mpg performance increase. I know with my flash pack that came with my truck the economy was cool but because it cut engine power I had to push the peddle more to get the needed power and ended up making my mpg drop.

best thing to do is google top rated tuners and go from there.
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Old 08-18-2015, 04:16 PM   #3
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Hmmm. I have an 08 Screw w/ 5.4 and 3.73 rear. Stock it would get 20 hwy and 16-17 overall. Realize this is a couple months old, but hope the info helps.
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Old 08-26-2015, 07:56 AM   #4
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it'll take a while for a $400 tuner to make enough of a mileage difference to pay for itself
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Old 08-26-2015, 08:26 AM   #5
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Quote:
Originally Posted by LaMartian View Post
it'll take a while for a $400 tuner to make enough of a mileage difference to pay for itself
Agree. I have a Livewire TS with custom tunes from MPT and the 87 octane mileage tune is slightly better than stock for both mileage and performance. My everyday tune is 89 performance because it's both fun to drive and gets fair mileage
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