7.3L gas economy - Diesel Forum

Diabloz · 10-29-2009, 07:39 AM

What is the best way to save gas if i were to get a F250.

Put a chip? If yes, Which one? and how much would i be saving? MPG ect..

What else can i do?

jroller · 10-29-2009, 10:12 AM

Carry as little weight as possible and drive it like my grandma. An 80 econo tune on the freeway will help a little. I changed my uppipes and IPR sensor and I picked up a MPG or two that I had been missing all this time.

HighwayPrisoner · 10-29-2009, 10:48 AM

7.3 PSD can pass all the gas pumps, but prefers good quality Diesel fuel. The driver is the most important for good fuel mileage. Driving, and weather conditions are a close second. An improved air intake like a Ford AIS, a less restrictive exhaust system, tire pressures, and a good econo tune can help, once the cost of the mods are recouped. Lift kits, and big rubbers definately hurt economy.

DHTD · 10-29-2009, 10:48 AM

They do quite well on gas mileage because they dont take gas,LOL!

Diabloz · 10-29-2009, 01:53 PM

Quote:

Originally Posted by HighwayPrisoner

7.3 PSD can pass all the gas pumps, but prefers good quality Diesel fuel. The driver is the most important for good fuel mileage. Driving, and weather conditions are a close second. An improved air intake like a Ford AIS, a less restrictive exhaust system, tire pressures, and a good econo tune can help, once the cost of the mods are recouped. Lift kits, and big rubbers definately hurt economy.

Sorry im kinda new to this lol, I understand the intake but what would you mean like an less restrictive exhaust system, and econo tune,where would i get this.

Diabloz · 10-29-2009, 02:21 PM

Quote:

Originally Posted by jroller

Carry as little weight as possible and drive it like my grandma. An 80 econo tune on the freeway will help a little. I changed my uppipes and IPR sensor and I picked up a MPG or two that I had been missing all this time.

What are uppipes and IPR sensor?

Btw im trying to move it up to at least 20 MPG.

aklim · 10-29-2009, 04:05 PM

Quote:

Originally Posted by Diabloz

Sorry im kinda new to this lol, I understand the intake but what would you mean like an less restrictive exhaust system, and econo tune,where would i get this.

You currently have a 3 or 3.25 in downpipe. The less restrictive exhaust system consist of the 4 in downpipe (largest you can fit in without SERIOUS modifications and a free flowing muffler.

The Econo tune is got from DP-Tuner as part of his lot of tunes. A tow tune has a softer shift since you don't want to jar everything you are towing whereas the econo tune has a faster shift and makes more power but is easier on gas than say an Aggressive 140

Diabloz · 10-30-2009, 01:27 PM

Quote:

Originally Posted by HighwayPrisoner

7.3 PSD can pass all the gas pumps, but prefers good quality Diesel fuel. The driver is the most important for good fuel mileage. Driving, and weather conditions are a close second. An improved air intake like a Ford AIS, a less restrictive exhaust system, tire pressures, and a good econo tune can help, once the cost of the mods are recouped. Lift kits, and big rubbers definately hurt economy.

Where and how would i tell if its quality diesel?

aklim · 10-30-2009, 01:48 PM

Quote:

Originally Posted by Diabloz

Where and how would i tell if its quality diesel?

Usually, you want to avoid the Mom & Pop shops where the diesel sits in a tank for who knows how long. I try go to shops where they have truckers stop by often so the diesel is fresh. Also when you go to M&P shops, the prices are slower to react. So if it falls, they are still up there and if it rises, they are down there. Too much fluctuation for my liking.

Diabloz · 10-30-2009, 04:15 PM

Quote:

Originally Posted by aklim

Usually, you want to avoid the Mom & Pop shops where the diesel sits in a tank for who knows how long. I try go to shops where they have truckers stop by often so the diesel is fresh. Also when you go to M&P shops, the prices are slower to react. So if it falls, they are still up there and if it rises, they are down there. Too much fluctuation for my liking.

Thank you, i understand about that now =)

WB7E · 10-31-2009, 07:19 AM

Keep the tach under 2000. That is when my mpg drops.

fxdwgi · 10-31-2009, 08:49 AM

18-19 mpg on my truck @ 70-75 mph.

It only took $5000 to get it there.......

butchcassidy1 · 10-31-2009, 09:00 AM

20 - 21.8 mpg (hand calculated), 5- - 55 mph, cruise on, unloaded, 265 tires, not lifted, tire pressures 50 in front, 60 in rears, no jack rabbit starts, coast up to stop signs, red lights.

Hopes this helps,

Butch Cassidy1

bnjmnalan · 11-02-2009, 04:30 PM

Quote:

Originally Posted by fxdwgi

18-19 mpg on my truck @ 70-75 mph.

It only took $5000 to get it there.......

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:

Quote:

Originally Posted by butchcassidy1

20 - 21.8 mpg (hand calculated), 5- - 55 mph, cruise on, unloaded, 265 tires, not lifted, tire pressures 50 in front, 60 in rears, no jack rabbit starts, coast up to stop signs, red lights.

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?

fxdwgi · 11-02-2009, 06:14 PM

Quote:

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.