Ford Engines, 4.6-liter, 5.4-liter

After years of delivering power to two of Ford Motor Company's iconic products, the Ford F-150 and Mustang, Romeo Engine Plant has reached a historic milestone - " the production of its 10 millionth engine.

[Will-Yum]

Looking to buy a new f150 2009 super crew. Should I get the 4.6 or the 5.4 . Lokking for good fuel econemy plus towing power. Any thoughts. Also a 3.55 or 3.73 rear end ??? Thoughts / comments ?

[FORD]

Will-Yum wrote:

Looking to buy a new f150 2009 super crew. Should I get the 4.6 or the 5.4 . Lokking for good fuel econemy plus towing power. Any thoughts. Also a 3.55 or 3.73 rear end ??? Thoughts / comments ?

What are you towing?? Test drive them both and see what feels right. If you are going to be making a living off the truck, I would say go for the 5.4.

[noah_at_lamontgl ass_com]

DO NOT go with the 4.6 in a truck, weak and sucks gas as bad or worse than the larger engine.
I get 11 mpg with my 99 f-150. maybe 12 1/2 on a long road trip.

[will -yum]

noah_at_lamontglass_com wrote:

DO NOT go with the 4.6 in a truck, weak and sucks gas as bad or worse than the larger engine.
I get 11 mpg with my 99 f-150. maybe 12 1/2 on a long road trip.

Thats not good ....I wonder if it has improved in the last 10 yrs ???

[will -yum]

FORD wrote:

<quoted text>What are you towing?? Test drive them both and see what feels right. If you are going to be making a living off the truck, I would say go for the 5.4.

Just a family truck . Hauling a 16 ft flat deck trailer with quads..... I'm looking for good fuel milage but a little power also. Everything I hear leads me to the 5.4 though

[noah_at_lamontgl ass_com]

I have no idea why they make it. But, much as I love them, Fords get crappy gas mileage. I am looking at a 98 Mustang convertible and not that I care as much about mileage on that car, still it is a thought. If I have to lack power shouldn't I get some better economy in return?

[derek]

i hav a 99 f150 with a 4.6 as well i got about 10mpg (incredibly depressing) and talked to others that get like 17... i just bought an edge programmer and now i get 15 which is really helpful and could potential pay for itself over time but still kinda sad...i think the issue is i hav to high of gears for that small of an engine but not sure im still gonna play around with it

[eric]

id go with the 5.4.It is a tremendous engine!

[noah_at_lamontgl ass_com]

I just took a 500+ mile trip. I filled up with a Mid-Grade gas this time. Now I got 17 MPG. The best I ever have with this truck. I have done a few minor things ( K&N airfilter, Bosch Platinum 4way tip plugs etc.) but not a ;chip' or anything.

I wonder if it is case of regular octane gas being a crappy weird formula here. I am told Metro Minneapolis has a anti-smog formula. Or perhps it is just the octane. LAt week we made the same drive in my 2000 Taurus SEL with the one year only 24valve DOHC aluminum engine. I used Mid-Grade again and got a 7MPG increase. Grated it is city v/s hiway in both cases.

Anyone else have fuel quality ideas? How about economy chips or programing?

[jake]

those damn 5.4 engines suck mine just shit the bed to manny little problems i hate them

[noah_at_lamontgl ass_com]

I do hope mr. Obammy's Clunkers program has rid the counrty of most of the F-150 4.6's.
I guess they are nice in a Mustang, but I say no way in a F-150.

[Rick]

This is old news.

[Zeke]

I have a 99 f-150 extended cab with the 5.4, it has 239,000 miles on it with no problems, I changed spark plugs and coils at 150,000. I have been avg 18-19 mpg on 25 mile drive to work, mostly interstate some city. With a 8000 pound horse trailer I drop down to 11-12 mpg.

[Mike]

I wish I could get my Ford F250 Super Duty 5.4 to pull a 8000 pound horse trailer, I have spent several $ on it . I have a 9680# camper and it wont pull it.

[Travis]

I have a 2000 F150 4x4 with the 4.6 liter and i love it I have an intake bigger throttle body and tb spacer,a programer and have lots of power enough to roast 36x15.5 tires. Plus I have won truck tug o wars with it pullin heavy diesels trucks.

[WeaserGB]

Just bought a 2010 super cab F150 with a 4.6L. My old truck was a 2003 crew cab with a 5.4L. The world has changed men. I loved my 2003 but the 5.4L sucked gas. It was hard for me to get over 12mpg. After a test drive of the 2010 4.6, I knew this engine was fine and not underpowerd. With 3 valves/Cylinder and a 6 speed transmision it had more power than my old truck with the bigger engine. On the highway I can get 22 MPG with the thing. This engine is almost pushing 300 HP Mixed driving I can get 17 all day long. Let talk about modern design 4.6L not 5 or 10 year old designs.

[gbanks]

are yall brain dead the 5.4l have aluminum heads that blow the plugs out and ford wont repair them

[WeaserGB]

Are you saying all 5.4 have issues or certain vintage? Half truths make people like yourself look brain dead. I believe you just make a statement that has limited truth.