i just got about 17 mixed city and highway. but i drove VERY easy and even let off the gas to make the tranny shift early, i think these truck do alright but it is very boring to drive that way. especially when i want to hear my magnaflow

 

hahaha... I think I live next to your neighbors' cousin or something... Mine has a prius and a golf... and a toy dog that keeps barking at my Malinois... I too wonder what would happen if he accidentally got out...

I got soo much **** from him when I put seafoam in my truck and filled up the street with smoke...

 

Save your dog the trouble and just shoot the cat....

 

It feels like we're sitting on the poop deck of the Titanic discussing if it'll make four or five knots as the bow is down by thirty degrees. I'm trying to decide if it's worth the four gallons of gas to go to the junk yard tomorrow and pick up a brake junction fitting for the Volvo. Maybe I can get a check from the government to help out?

I've got to fix the junker so I can not drive my '04 XL. Is this the "change" everyone is getting all giggly about?

 

This is about the 20th milage forum I have posted on. Yes, I have a milage fetish.
These big trucks are heavy. And under powered in my opinion. But the fit and finish of the Lariat was not to be compared by any other manufacturer.

That said, I get 12.8 city, and about 17 highway. Down hill on a not windy day I get 19. Pulling my full load travel trailer at 6000lbs. I get 9mpg.

People who say they get 20 mpg on a f-150 are smoking crack. It ain't gonna happen. Unless they are at sea level and going down hill!

 

I wouldnt necessarily say that its possible just hard to achieve easiest would be in a 4.6 auto or 5spd 2wd

 

19.6 out of my first tank. No ac on and mixed driving, hwy/city/mud.
15.9 out of second tank. AC full blast, stop/go traffic/drivethroughs sitting with truck running.
18.6 out of 3rd tank. mostly trail riding at night no ac on. New 33" tires.
AC kills the mileage IMHO.
On 4th tank now.
BTW 4.6 reg cab, auto 4wd, flowmaster muffler. 1100 miles on truck.

 

that's pretty much how my best tanks were... cruise control on 65 through all of kansas. Did get 2 tanks in a row to average just over 20... but that's also mainly cause kansas is a pain to drive through...

I've gotten just over 21 with the old truck, reg cab 5.4 2wd short bed 3.73s, on the same stretch... so it is possible... practical/often - heck no.

When I don't baby it, i get about 12 all city driving... my usual commute, about 14.5-15, mainly cause a good chunk of it is freeway, albeit it's stop and go rush hour type freeway often...

pulling a 6000 lb trailer with the old truck, phoenix to minnesota, I got 11mpg avg for the whole trip... The 5.4 was perfect for that truck, with that gearing, but it is indeed underpowered and/or undergeared for the 6000lb screw with 3.55s :\

 

Well, I've registered just over 20 mpg with a '04 XL, long box, 4.6L, 3.73 rear end, 2WD, auto, on cruise, half loaded, at 66 mph, all day. Tanked up the next morning, divided, 20.3 mpg. I've seen this whenever the conditions are replicated.

I was surprized, but WTH, it's me driving a Ford! Later dudes.

 

06 scab 4x4 fx4 3.73:1 bridgstone revo in stock size.


1st 40k 16.7 mpg average. drive 150mi /day. start out @ 3800' elevation, drop to 2k, then up to 3k, then down to 300', then do the drive home. lots of steep grades, lots of downhill coasting.

last 23k average 15.1 mpg, same exact drive.

relign vehicle every 6k

a/c on, or off makes no mpg difference.

truck will be 2 years old (well, i bought it new on 11-29-06) end of november.

maybe it's time for a new air filter ehh?

ohh, always 87 octane, which is $4.55/gallon at the gas station i use, and has been for about 2-3 weeks.

 

I have a 05 SCAB 4.6L 4x4 with 3.55s , Penzoil Full Synthetic Motor Oil and an Edge Evolution set for LvL2 (Towing) 78000 Miles on the odometer

Driving is a Daily 100Mile commute to work. Roughly 70% Highway(Open), 10% Congesated Highway, and 20% City

Before with the Edge and Getting to 75-80 whenever I could I was averaging if lucky 14.5 -15 MPGs/ Tank

Since the rise in the price of fuel, I have actually been using my Cruise control more often and Dropped my speed to 65-69MPH in 65 MPH zones (Roughly 10 Miles) and 59-64 MPH in 55MPH zones. My MPG/Tank has averaged anywhere from 18-18.5 MPG and that has been the case for the last 7 fillups.

Oh and I avoid hard accelerating as much as possible.

 

People who say they get 20 mpg on a f-150 are smoking crack. It ain't gonna happen. Unless they are at sea level and going down hill!
Well dude im not smoking anything and have no problem getting 20 mpg 62 mph at 65 mph 19 to 19.5 mpg and at 60mph 21 mpg
if i run 75 mph still get 18.5 mpg
it seems most on here run 4X4s hence maybe lower mpg also if there is more than 10% ethenol in fuel mpg will drop
im in Ontario Canada and the truck is bone stock
maybe all the mods every one makes and the kind of tires you use are pulling your mpg down

 

Good mileage isn't that difficult if you drive right. My truck with a Roush supercharger is EPA rated by Roush at 8 city and 11 highway. With a custom tune and larger lower boost pulley I get about 15 mpg city and close to 18 mpg highway. If I slow it down just a tad on the highway I get near 19 mpg. Get a Scangauge II, Dashdaq, Edge or SCT and monitor MAP, load and TPS, or with a supercharger TPS, load and boost. Minor changes in driving based on watching how hard the engine is working can make dramatic changes in fuel economy.

I'm doing some datalogging with the wide-band O2 to see how rich its running. If its within the margin of safety with the blower I'm going to lean it out just a tad and see both power and mileage go up more.

Better than EPA mileage ratings on these trucks is possible. I'm getting far better and still occasionally romping on the throttle (what good is a blower if you don't blow someone away? ). My truck is Supercrew FX4 with 20 inch wheels so it has more weight, more drivetrain loss, more rolling resistance and and I'm about 1000 ft above sea level than a standard cab, 4x2 with factory tires at sea level. If you're not getting close to 20 on the highway at low altitudes check your tire pressures and learn to drive more conservatively.

A few things that are factors we have no control over which can impact economy:

1. Altitude. The higher the less fuel economy you'll receive. For many engines its roughly about 1% loss for every 1000 feet.

2. Humidity. The higher the lower the fuel economy.

3. Temperature. The higher the lower the fuel economy. Take 2 and 3 combined and it can be very dramatic. Using standard HP correction factors many engines will suffer an 11% loss of horsepower on an 85°F and 85% humidity day verses a 55°F and 35% humidity day.

4. Fuel formulation. This varies by region, city and time of year.

Also, stay away from stations which add 10% ethanol to the fuel. It will decrease economy.

 

This man speaks thruth. However, if you ever hit 20mpg, you better call roush to send back their stickers, cause that means you're driving like a blue haired 113 yr old grandma

 

Ken- When are you going to be done with your article on improving fe??