Ok I am always reading about the 5.4L motor, but what if I not looking for more power like everyone else. I currently own a 07 HD F-150 with the 5.4L and find there is more than enough power for me. What I want is more MPG. I am considering looking at the new 4.6L 3V with 292HP and the 6 speed auto! How many more MPG can I expect out of this motor compared to my 5.4? Will I notice a difference in power between the two? I am guessing the new 4.6 with the 6-speed would out run the old 5.4 with the 4-speed? Is there any numbers on this new motor in the 09 F-150?

Thanks for any info!

 

I would expect that you would only average a 1 or 2 mpg increase by choosing the 4.6l and so far from what most reviews are saying that the new 6 speed is only helping with towing and shift smoothness. So don't expect to be able to outrun a 04' 5.4l.

 

Any Ford guys know why 4.6 3v not offered in the Platinum or Lariat ?? Catalog only gives or lists one engine. 5.4.

 

I dunno, but you're pissing up a rope buying one of these trucks in the name of (better) fuel economy.

 

Same reason you couldn't get a 4.6 in a '04-'08 Lariat, FX4 or King Ranch.

It's kinda self defeating, offering the most expensive, top of the line vehicles with low or mid grade engines.

 

We have the 4.6L 6 speed combo in a Explorer Sportrac.
It's a pretty good combo though the tranny does seem to get confused sometimes.
MPG not really that great....probably around 20mpg @ 70mph.

 

Yes I know not to buy a truck for MPG. I just don't need the power I have in my 07 5.4L so when considering a new truck I am thinking of MPG vs power. If 300hp is good for me now I think 292hp will be enough for me. I was hoping for real MPG not just what ford says. I don't tow, I just use my box to haul stuff around.

 

Consider that smaller engines work harder to perform the same amount of work a larger engine does. Work harder = use more fuel.

 

I have a mechanical question for u would it be OK if I p.m. u with it not getting much help from my dealer it is an 04 5.4L???

 

If you want a SuperCrew, look at the SFE package. It's the 4.6 3V with 6 speed and a 3.15 axle.

 

Not quite... I got 19.2 mpg for hauling a bed full of computer equipment the past 2 days in city and highway. Wait... I'm the exception because I drive stick and only shift below 2000 rpms, like vehicle should be driven.

It's funny when I drove an Edge, the rpms soared to 3000 to 4000 rpms all the time I went from a stop. It's so funny, here I am doing 20 mph, and it's at 3500 rpms.

 

You're the same dude that slammed on the parking brake of an automatic transmission equipped vehicle, thinking it was a clutch.

No offense, but I don't think real highly of your opinions or experiences.

 

hahaha. i have outrun a stock 5.4 in my 4.6 with 35's. dont ask me how but it happened. i think you would be plenty happy with the 4.6 3v. i wish i had taht much power. but if you have the money i would get the 5.4 anyways. im assuming you do since your ditching your 07 HD for a 09.

 

Well I think I am just going to wait until I see what MPG everyone is getting with their new 4.6 3V. I just didnt really want to wait for the eco boost to come because I am sure it will need 91 octane and that really takes the advantage away from it. From research it looks like Ford is the only one with a good second choice motor for MPG. Only time will tell. Thanks to everyone who replied.

 

The Ecoboost engine will run on regular 87 octane gas, and will not require premium fuel.

http://blogs.cars.com/kickingtires/2.../ecoboost.html