RichardCheese

So I have had my fair share of cool fast stuff when I was younger. When I had my 10th anniversary SLP FireHawk I had a set of underdrive pulleys on it (amongst other goodies). One thing that I noticed after I installed them was my MPG went up by almost 2 MPG. I would love to see my 5.0 get better MPG then an 3.5 EB, So my quest begins with this post...

So my main question is with the correct mods do you think a 5.0 could best 24 MPG highway??

Has anyone else on the forum installed a underdrive pulley set, Cold air intake, tune, or exhaust on a 5.0?? . If you have done, please share any pros or cons you have noticed in regards to your MPG as a result of said modifications.

Note: I'm not taping up all my panel gaps or slamming the truck in the weeds. Please sensible suggestions olny

Toovey2v

Saw this today on Facebook

KYBuckeye

A tune would probably be your best bet. A lot of people gain 1.5-2.0 mpg with just a tune.

However this begs the question, how much money do you want to spend to get 2 more mpgs?

If this is just an experiment then I get it. I'd hate to dump $1000 into fuel savings mods because your payback may take a while.

RichardCheese

Its not too much about the money (within reason), but if I can get a faster truck with more HP, Torque, better exhaust note, AND get better mpg...Why not?? I have been down this road with almost every car/ truck I have ever owned. I know that I will never see a ROI on this stuff, but at least it doesn't add insult to injury like bigger tires or a lift. You spend the money on them and then get hit at the pump with 12 mpg till you sell the truck.

Velosprout

The sensible suggestion to get twin-turbo direct-injection performance from an F150 is to trade for a 2016 EcoBoost truck. This would get immediate results, be easier and perhaps cheaper than modifying a 5.0, allows you keep the warranty, have a faster truck off the line, with a better power to weight ratio and better towing capacity. The only thing you lose is the V8 rumble.

DallasTXF150

2mpg improvement per gallon @ say $3/gallon equals to about (15mpg to 17mpg costs now $2.647 for the same 15miles per gallon) a cost savings of $0.353 per gallon.

So I guess a good estimation is to recoup the $1000 you will need ($1000/$.353=2832miles of improvement which means 2832/2=1416gallons).

So after 1416 gallons or so you will break even on spending $1000 to improve 2mpg.

1416/36gallon tank = 39 full tank refills

I could be wrong... I'm on my 9th beer lol

Fireman5.0

My 15 screw 5.0 has 4x4, 331 gears and I'm avg 20.1 mpg on 93 octane. Instant mpg reads between 23-26 @ 60 mph. Running 70-75 reads about 20-22. Completely stock.

cwm180

The 5.0 has a better power to weight ratio than the 3.5EB.

todd92

Anything you could do to a 5.0 that would improve the MPG/performance you can do to the 2.7 or 3.5 and would have a greater impact on the those engines. Especially a tune.

Neffster

LOL!

I think there is another way of looking at it:

1. 15 mpg to 17 mpg is a 13.33% increase
2. Using your numbers:
..a. $3/gallon at 15 mpg translates to $0.20/mile
..b. $3/gallon at 17 mpg translates to $0.18/mile
3. At $0.18/mile * 15 miles/gallon = $2.65/gallon
4. That's equivalent $0.35/gallon saved.
5. If the tune costs $1000 you would need to use $1000/($.35/gallon) to end up using 2,833 gallons of gas.
6. We just determined you can now go 17 miles/gallon and you need to use up 2833 gallons... thus you'd need to travel 48,167 miles to cover that $1,000 investment.
7. 48,167 miles / (36 gallons/tank * 17 miles/gallon) = 78.7 tanks of gasoline.

Did I mess it up too?