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[fxdwgi]

Originally Posted by bnjmnalan

fxdwgi claims the above #’s driving a ’01 F350 4x4 Crew Cab on 315/75 (35” tires) and a 4” lift. (According to his signature)

Big heavy truck, 4 Wheel Drive, High speeds, Lifted, Big tires and Great MPG’s??
That was a well spent $5k. Your pushing me to the edge of what I’m willing to believe. Of course this is posted on the internet so it must be true and accurate. Were you climbing a 7% grade against a 20mph wind as well? I'm mostly just joking around. If that is accurate then I am definately interested in the mods you have in your truck!

The very next post is the exact opposite:


Butchcassidy1 claims the above #’s driving a stock (according to sig) 2wd (assuming reg cab).

Relatively small, No lift, Stock tires, Slower than Grandpa on a Sunday afternoon and only a 1-2 mph difference from fxdwgi.

These two claims don't seem to be consistant unless the mods fxdwgi has really do make that much of a difference. From what I've read on these forums, the tuning doesn't make that much of a difference but I have heard good things about Transmission / torque converter upgrades. Any other similar experiences?

Both these guys are getting way better mpg's than me so I AM jealous! Maybe I can combine fxdwgi's mods with butchcassidy1's driving style and have a sweet truck that gets 30 mpg?

Oh, I forgot to add that the 18-19 mpg @ 70-75 mph is on 120R setting with my tires @53 psi. I actually got .5 mpg LESS using the 80 E setting (calculated over a 3 week period alternating every tank with every setting) I have this calculated 5 ways of Sunday via a program called Roadtrip. Now my brother who has the identical truck and identical mods but without the lift, get 19- 20.5 mpg (he is on here also).

I have found that the mpg improvements were incremental to mods and not one mod was a mileage silver bullett. Take into consideration the Boostmaster; I have gained about .8 MPG just with that.

But the biggest reason we get good mileage is that we are all over our trucks on maintenance and repairs. Do you have any idea on the mpg loss of just having a brake pad clip not seated correctly and the pad resting on the rotor ? Or having a U-joint not fully lubed ? I don't have any idea what the MPG cost of those items are, and I never will.

Rotating mass takes power to turn, the harder it is to turn the more power it takes.

Here is another out of this world claim for you to chew on; I also have a 2000 Grand Marquis that gets 26-28 mpg all day long at 75-80 mph.