towing mileage of trucks

2macs. Without getting into specifics, your mechanic is 120% full of sh____!
Don’t ever return to him Except to punch him for trying to rip you off.
Lift pump, better filtration and tuning are real things that have benefits, just not what he says.

2Macs wrote:
I have a 2007 Chevy Dually Diesel w/ Allison transmission that I tow a 37 foot TT with. I generally get 10 to 11 mpg towing on relative flat roads. Worse in the hills. My diesel mechanic has recommended that I add an Air Dog 150 Lift Pump to significantly increase my mpg as a beginning fix. Cost will be around $900 installed. He also recommends adding a EFI Live Duramax Tuner at a later date. Cost for this will be in the same range. When all is complete, he says I should get around 20+ mpg while towing.

Has anybody else completed these upgrades? If you have, what results are you getting and would you recommend this upgrade?

He is full of "Barbra Streisand" !!!!!!!!!!

Ask him to put it in writing with a money back grantee.

INCREDIBLE!

I have a 2007 Chevy Dually Diesel w/ Allison transmission that I tow a 37 foot TT with. I generally get 10 to 11 mpg towing on relative flat roads. Worse in the hills. My diesel mechanic has recommended that I add an Air Dog 150 Lift Pump to significantly increase my mpg as a beginning fix. Cost will be around $900 installed. He also recommends adding a EFI Live Duramax Tuner at a later date. Cost for this will be in the same range. When all is complete, he says I should get around 20+ mpg while towing.

Has anybody else completed these upgrades? If you have, what results are you getting and would you recommend this upgrade?

Cummins12V98 wrote:
I stand by my statement, more weight equals less fuel economy.

I also stand by my statement that a 17/18 F350 will pull any DRV out there just fine like my 15 RAM will within axle and combined ratings. So why spend the extra $$$ on a 450??? OH yea for the tighter turning radius?

I’m sorry Sir, but your statement is simply false.

I have an F350 and an F550, under similar loads at 50 mph, 80 kmh, my F550 gets better mileage. Both of them (combined weight) outweigh my Class A motorhome and get better mileage than it does.

More weight does NOT equal LESS mpg.

More EFFICIENCY equals less mpg.

I stand by my statement, more weight equals less fuel economy.

I also stand by my statement that a 17/18 F350 will pull any DRV out there just fine like my 15 RAM will within axle and combined ratings. So why spend the extra $$$ on a 450??? OH yea for the tighter turning radius?

Cummins12V98 wrote:

FishOnOne wrote:

Cummins12V98 wrote:

forkedhorn wrote:
Thanks Scott, kind of figured that. Thinking about a 44 Santa Fe Mobile Suite or a 42RL Luxe and an f-450 instead of the ram.

Why do you think you need a 450? If you are stuck on Ford a 17 or newer 350 will do just fine!

I tow as much or more than your rig will weigh with my RAM 3500 at 33k combined or 35 if double towing my Motor Cycle trailer with two Cruisers.

Pretty hard to beat a straight 6 for mileage.

Perhaps he want's the F450 because of the wide track front axle for the improved turning radius. And towing these amount of loads the fuel economy between the two is a wash.

No way will a 350 and 450 get the same fuel economy. More weight equals worse mileage. Even with same gear ratio.

According to published figures there’s only about 1,400 pounds difference between comparable F450’s and Ram 3500’s.

If you’re talking about a 35k pound combined unit I doubt you could calculate that mileage variation attributed to a 4% increase in weight.

Besides which, weight has very little to do fuel mileage in the overal scheme of things, my neighbours tractor trailer gets a consistent 1 mpg (loaded) better mileage than his motorhome does, I’ll bet the motorhome weighs a BUNCH less than his truck does.

Cummins12V98 wrote:

FishOnOne wrote:

Cummins12V98 wrote:

forkedhorn wrote:
Thanks Scott, kind of figured that. Thinking about a 44 Santa Fe Mobile Suite or a 42RL Luxe and an f-450 instead of the ram.

Why do you think you need a 450? If you are stuck on Ford a 17 or newer 350 will do just fine!

I tow as much or more than your rig will weigh with my RAM 3500 at 33k combined or 35 if double towing my Motor Cycle trailer with two Cruisers.

Pretty hard to beat a straight 6 for mileage.

Perhaps he want's the F450 because of the wide track front axle for the improved turning radius. And towing these amount of loads the fuel economy between the two is a wash.

No way will a 350 and 450 get the same fuel economy. More weight equals worse mileage. Even with same gear ratio.

Yes fuel mileage is essentially the same.

FishOnOne wrote:

Cummins12V98 wrote:

forkedhorn wrote:
Thanks Scott, kind of figured that. Thinking about a 44 Santa Fe Mobile Suite or a 42RL Luxe and an f-450 instead of the ram.

Why do you think you need a 450? If you are stuck on Ford a 17 or newer 350 will do just fine!

I tow as much or more than your rig will weigh with my RAM 3500 at 33k combined or 35 if double towing my Motor Cycle trailer with two Cruisers.

Pretty hard to beat a straight 6 for mileage.

Perhaps he want's the F450 because of the wide track front axle for the improved turning radius. And towing these amount of loads the fuel economy between the two is a wash.

No way will a 350 and 450 get the same fuel economy. More weight equals worse mileage. Even with same gear ratio.

Cummins12V98 wrote:

forkedhorn wrote:
Thanks Scott, kind of figured that. Thinking about a 44 Santa Fe Mobile Suite or a 42RL Luxe and an f-450 instead of the ram.

Why do you think you need a 450? If you are stuck on Ford a 17 or newer 350 will do just fine!

I tow as much or more than your rig will weigh with my RAM 3500 at 33k combined or 35 if double towing my Motor Cycle trailer with two Cruisers.

Pretty hard to beat a straight 6 for mileage.

Perhaps he want's the F450 because of the wide track front axle for the improved turning radius. And towing these amount of loads the fuel economy between the two is a wash.

"I suspect the Ram would have 3.73’s and the F450 would have 4.10’s, maybe even a higher ratio."

RAM DRW trucks come in 3.42, 3.73 and 4.10 with auto trans. ALL SRW RAM's come with 3.42's with auto trans.

Can't remember what's available with the 6 speed stick.