5.4 Mileage in a Super Duty - Diesel Forum

Tigger · 10-23-2007, 05:49 PM

What are you 5.4 owners getting for mileage in a SD? I am looking at buying a CC 4X4 and don't think I am going the diesel route so I am curious as to the mileage and to a lesser extent the performance of the 5.4. I know it wont be a diesel, but how do you like it?

Mercury · 10-23-2007, 06:20 PM

My 5.4 does everything i need it to do, I do mild towing, heavy bed loads (full bed loads of wood or pumpkins)

I also have 37" tires and 4.56 gears - for a 5.4L it does well. With a performance tuner and super (93 octane fuel) it does really good in my opinion

It aint no diesel, and it aint no V10

but if your not towing things daily then it will prolly be fine

my milege ranges from 11 - 13MPG

kenny

Snake Eyes · 10-23-2007, 07:20 PM

My 5.4 has been perfect for my needs...I tow cars ranging in size from modern compacts to classic muscle and I have never been left wanting. I don't often have the bed full up though so I can't say about that.

I haven't done anything to the engine yet short of custom straight pipe duals and Royal Purple. I get a consistent ~14mpg and when towing still get ~11. I know a tuner/chip would help in both mileage and power so that's probably next...soon as I stop spending money on other crap.

I love my V8, wouldn't have it any other way...heck I just bought myself an '04 P71 with a 4.6 in it and she hauls like you wouldn't beleive!

John

Bassman349 · 10-24-2007, 10:45 AM

Mine is bone stock with 4.11 rear.

12mpg around town, 13.7 highway, 8.0 towing 6000 lb. camper.
I only have 2000 miles on engine, so I'm hoping things get a little better later on.

carrfamilynj · 10-24-2007, 04:37 PM

I've got a '04 E350 15 pass with the 5.4, with my daily gear in it I'm running about 8600 lbs. My mileage ranges anywhere from 10 to 12.5 mpg, depending how hard I drive it.

campfire14 · 10-25-2007, 01:37 AM

My previous 03 F250 SC LB 6spd 4x4 w/4.10's got around 12 in town and 14-15 on the highway. Bone stock with 235/85/16's.

sluzski · 10-28-2007, 09:01 AM

Just picked up my 08 from the dealer, and I must say that I`m very happy with it. Getting 14 in the city and 17 on the highway.

Ugly-Jeep-Truck · 10-28-2007, 12:39 PM

That's insane, our 2wd 5.4 250/350s at work get around 10-12 highway. Are you hand figuring 17 highway or believing the computer?

sluzski · 10-28-2007, 07:53 PM

Thats hand calculated. Bed cover with no load.

doczenith1 · 10-29-2007, 02:43 PM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: skuzski</div><div class="ubbcode-body">17 on the highway. </div></div>

That doesn't mean much. How fast were you driving? My mileage will vary by 3 mpg's between 60mph and 80mph. What there a tailwind? Wind speed and direction also have a large impact on gas mileage with our trucks.

Ugly-Jeep-Truck · 10-29-2007, 04:13 PM

Yeah..color me skeptical with 17.

sluzski · 10-30-2007, 09:18 PM

When I got the 17 mpg, there was no headwind and I was travelling about 65 mph. Also, the fuel that I was running contained no ethenol.

honda_guy4 · 10-30-2007, 11:09 PM

My wife's F-150 will get 16-17 if you drive nice w/edge on it. Around town only 13-14 mpg. I would expect a couple of miles/gallon lower due to weight/aerodynamic differences depending on your gearing in your rearend.

Texrob1 · 10-31-2007, 09:59 AM

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: skuzski</div><div class="ubbcode-body">When I got the 17 mpg, there was no headwind and I was travelling about 65 mph. Also, the fuel that I was running contained no ethenol.
</div></div>The No Ethanol probably helped more than anything,since we are burning it in the wife's Expedition,we have lost at least 2 MPG! [img]/forums/images/%%GRAEMLIN_URL%%/mad.gif[/img]

NEG297F · 10-31-2007, 08:53 PM

Loaded with the truck camper and pulling the boat or quads I get a whopping 10 MPGon the Highway, city I get between 14 and 15. Of course I didn't buy an F250 for the mileage.