i own a f250 cc sb 5.4l, it gets abut 10 mpgs highway or city, i was going to down grade to a f-150 with the 5.4l, (IS IT WORTH IT)? just wondering what the difference in mileage is.

thanks guys any post would be greaty appriciated!!!!!

 

my 05 150 averages about 12 mpg. i get 15 on the highway most of the time. my best was 18 once and only once.it has the 5.4 and is a scab longbox. the 150 is lighter that the 250,so that may help. i drive a 250 at work with the 5.4 supercab and get 15 on the highway also. both are 4x4. hope this helps.

 

yea thanks for the fast reply, i've been looing around but im not to sure if it is worth losing all the tow rating. i tow a camper around 6000 lbs around to motorcross races, but then all my gear, bikes, and what ever else.

 

haven't had the opportunity to pull that much yet with mine ( maybe you've just given me my next project lol) my truck is the hd version,it has the 7 lug wheels and 4.10 gears, so pulling that much shouldn't be a prob. i'm not sure how much better pulling power you'll get with the 150. my advise if you do this swap, would be to make sure the gears are somewhere in the 3.73-4.10 range. your 250 is already in this range probably.

 

My 06 F150 XLT Super Crew 4X4 with 3.73LS rear gears gets 12 city, 15 highway.

 

I have a 2005 screw 4x4,5.4,3.73 , I get 10-11 mpg city and on a long trip with all highway miles I get 18-19mpg. I tow a 8500lb fifth wheel and get 10mpg highway and less if stop and go driveing

 

With a F150 5.4l expect anywhere between 12-16 city maybe better or even worse but these are common numbers with the 3.73 or 3.55 ratio

 

I get 17 mpg at 110 klh 65 mph around 18 19 at 60mph have gotten 24 at 55 mph in summer and 20-22 between 90 100 klhr
Stock 04 5.4 screw 2 w drive not sure what axel is in it got it in oct 07

 

Just got in from a 335 mile run between Gainesville and Pensacola FL. I have the 5.4L Screw FX4 3.73LS. With the leveling kit and 305/65/18 BFG AT, I got 16.8 mpg with cruise set at 79 mph. Before the upgrades, best was 19.1 with cruise set at 60-65 mph.

 

I have an '08 F-150 Screw, short box, 2wd, 5.4L, 3.73 diff, RoushCharged, gets 16.5 mpg overall driving. Tank in and tank out. And that's with our 10% ethanol blend. On 100% gasoline anywhere, I'd probably see 19 mpg over all. Ethanol results in 15-20% worse mpg.
CW

 

I get about 16.7 MPG with MTBE blend without towing.

Ethanol is a terrible fuel for combustion engines because it is hydrophillic or "water loving" and can cause corrosion in the fuel system and possibly in the combustion chamber. Phase seperation is another problem. Over time ethanol/gasoline fuels can phase seperate because water is more soluble in ethanol than gasoline. You get two liquid phases with the water/ethanol phase at the bottom of your tank because it is more dense than gasoline and you will lose octane! This is probably not that big of an issue IF you fill your tank often. But if it sits idle for long periods it is a huge issue. It is a big big problem for marine engines however. I much prefer MTBE!


Internal corrosion is the number one enemy for your engine. If the valve stems corrode they could break off and fall into the cylinder and ruin your engine!

 

got back from a 200 mile trip with some mountains and etc, on the way i got 16.5 and 15.4 on the way back with a 06 supercrew 5.4 3.55 gear king ranch! maybe my huge 20 inch rims and tall tires got to do something with that, prolly the 3.55 gears too.

 

Last month I drove from Nashville to Baltimore towing about 2800# all interstate and got about 12mpg. I've noticed mpg overall a lot worse than when I first bought the truck (9/2006). Used to get over 100miles on the 1st quarter-tank, now can't beat 85.

I always wonder at guys with the larger Fords but the same weak (IMHO) 5.4l engine...if the truck meets their expectations, etc.

 

Have an '04 F-150 Lariat Crewcab with 3.73 gears. Running empty, nothing in tow, and staying at the speed limit, I can crowd 20 mpg highway. City driving I hover around 14 mpg.

Towing, depending on the trailer and weight, varies between 11 and 13.5 highway. Using a higher octane in hilly country does help on the mpg.

Winter city driving is a killer. I'm lucky to see 10 mpg. I was in MN in January when it was seriously cold, like -3 for the high, and still got the same city mpg.

All and all, I'm happy with it.

 

If you are concerned about water in your fuel, you may want to consider adding a few ounces of Isopropyl Alcohol (99% pure if you can find it) at each fill up. I get mine from a local drug store (Isopropyl alcohol is also known as isopropanol or "rubbing alcohol") and use it in my snowmobiles to remove water from the fuel system to avoid freeze up in the fuel system. But I don't know if adding more Alcohol to your fuel system is the answer. I did however find some interesting reading regarding additives and the effects of water in today's fuel systems. I hope this helps.

http://www.startron.com/stretch.php?sec=4
http://www.jamestowndistributors.com...ct.do?pid=6412