I know now how they calculated the great mileage we supposed to get, The engine does get 20 miles to the gallon but then you add a chassis ,frame, wheels , tranny and a cab with seats and bingo here we are where we are at. Simple.............FS

 

 

In factory trim, my 2005, 5.4 with 3.55 gears got 19.2 running 75-80 on the highway. This was trips of 300 miles to South Texas. Once I changed wheels and tires, added nerf bars, etc and ethanol came into existance, I would get 16.

 

That is so funny I think I about wet my pants laughing.

 

I always get 20-21 mpg on a round trip of 175 miles, at 65 mph. Hit the interstate and run 75, the mpg drops to 18 on a 360 mile round trip.

 

When I was stock I got 21.5 but that was with a intake, exhaust and programmer

 

I have a 2010 with 5.4 and it gets 18.5-20.0 but today there is a place on the other side of the county that sale 100% gas on ethanol is this good for these new modular motors, It run better with that fuel the the other fuels that have that have ethanol. One of the tech at the dealership told me that it was not good for my truck?? It get better fuel mileage with it..

 

Straight gas is just fine and you will get better mileage.

 

Corn should be used to make tortilla chips and whiskey. It does not belong in a gas tank! Straight gas is much better.

 

With my heavy 20" Roush wheels and 285/50/20s I average 16-17.5 mixed and 20-21 highway. Stock tires add 1-2 mpg

 

I wonder why the stealer-ship told me NOT to use 100% gas??? He said it needs ethanol for the fuel system?? I thought ethanol attracts water? I thought 100% gas with NO ETHANOL was good for the new modular engines?

 

Ethanol attracts water, it eats rubber seals and has less energy content that gasoline. It also costs more energy to make it than it will create. It does however have a great farm lobby in Congress and is being pushed on us.

 

yup, just to help the corn farmers

 

i use corn for making my white drinking whiskey not my gas tank!

 

I know this might be hard to believe but you'll get better gas mileage on the top half of the tank than you will on the bottom half. So if you fill up on a regular basis at the 1/2 tank reading as opposed to near empty you should see an increase in mpg.

Originally I was a skeptic when my 70 year old mother mentioned she was getting more mileage when the tank was kept on the full side. So I decided to check this out with an older car ('79 Pontiac) I had been testing and tuning for best overall 1/4 mile, driveability and mileage.

Car is setup with O2 sensor, TPS, MAP sensor and data logger. Anyway I've been doing this for a few years now and sure enough as the fuel level in the tank drops below the mid point the engine begins to run progressively richer as it gets closer to empty. I have no idea why this would happen.

I also tested this on my FX4 and sure enough my mileage (always calculated manually) is slightly better when I keep the gas tank more than 1/2 full.

How's that for a COOL STORY?

Rediculous, right!

Aaaawe I'm just messing with you guys.

........NO I"M NOT!