well i have an 02 f-150 now, but im looking at an 07 f-150 extended cab FX4 5.4 with 20" wheels and 3.55 gears, its got 10k on it. Im also looking at an 07 1500 hemi ram quad cab with 20" wheels and 3.92 gears. Now i know everyone on here is going to say go with ford....i expect that being on a ford site lol. But i drove both and like both. Now i figure that the 5.4 will get better mileage than the 5.7, but im wondering what you guys are getting with yours. I wont be keeping it stock, ill be adding an intake, exhaust and programmer. Any help is appreciated

 

I have an 08 5.4 Screw with an Edge programmer, running on Level 3, and I get 17.5 city, and 19-20 hwy, going between 70-75. I have 3.73 gears though. I'm sure the 3.55 would be a little better.

 

I have been averaging about 15.7 with an SCT tune on 93 with my 08 5.4 Screw 3.55

 

I thought all FX4s had 3.73 gears. My 07 FX4 averages 17.5mpg in normal summer driving. Lately I've been using 4WD often and driving through heavy slush and snow. The mpg has been about 15 in these conditions. My best mileage was on a 800 mile trip driving 70mph most of the time yeilding 19mpg. I't an extended cab with the stock 18" BFG tires.

 

my 07 5.4 with no programmer is avg 17.5 in mixed driving

 

On my stock 07 Screw, I avg between 15.2 and 15.7 mpg in mixed driving. My best was 17.6 mpg while babying it. I don't like it, but considering I was only avg'ing 18 mpg in my 93 3.0 leaker Ranger. I can live with it.

 

I kept a consistant log while my truck was under warranty. My truck listed below with all the doodads (3.55 gears) was getting 17.8 Highway, 13.8 City (mostly dwntwn). I need to check up records since the K&N Intake and Edge Evo Tuner..

 

I get about the same bone stock.

 

I can give you both sides of the fence here. I've got a 5.4 and the 5.7 in the driveway right now
06 (bone stock) 14+MPG city, got 21 MPG on the long haul road trips. avg of 19 mpg highway

you just need to drive the speed limit and be smart about it

05 Durango with 5.7 (325 HP version)...it has the 3.55 gears.

12-12.5 mpg city
17 highway, about 20 mpg if I really baby the hell out of it.



that 07 had the MDS system. I have yet to find anybody who likes that. Sounds nice on paper, but real life has people complaining about the lurch and downshift hesitations when it goes from 4-banger to 8 cyclinder. Apparently it isn't so "seamless"

 

Is it true that it is not necessary in newer vehicles to let your vehicle warm up and does nothing more than waste gas? On cold mornings, I am accustomed to letting my vehicle run for 15 min or so to warm up...

 

There is no need to let ANY vehicle warm up. The only reason you let a carbed vehicle warm up was to let the choke pull off, even then 5 minutes tops and you were good to go.

 

Pfogle had it right on the nose...there is NO need to warm it up!

If you're concerned about MPGs, I'd strongly suggest finding a truck without those HEAVY 20" wheels...they will really eat into your MPGs...

 

On a normal day I let my truck run 30 seconds to a minute, just basically getting the oil all thru it well, and the idle to drop down some.
On colder mornings, say below the freezing mark I generally hit the remote starter, and let it run maybe 3 or 4 minutes.
I have mine intentionally set to shut off after 12 minutes if I do not put the key in the ignition.
Sometimes I just get busy on the phone with a customer, or something with the wife, or kids, and do not want it idling in the driveway for long periods.
I like it to just be warmed a few minutes so the motor is not ice cold is all.

Then I drive it easy for say the first 5 minutes before stepping hard on the throttle.

 

thanks guys...im not sure yet

 

most hemis get poor mileage burn oil and the cranks go