Lurch519

Has any one seen a fuel mileage increase with the SMARTY programmers, S-67 or S-67ME ?

wytesyko

First tank of fuel after deletes 22.5 mpgs combo hand calc, over the last 4k unloaded about 21ish depending on what im doing. I have nothing on towing mileage (havent towed anything bigger than the 5x11 alum).

Jim W

I posted this to another user question on why to delete. This was the main part of my response to his question. I feel this is the best information that I can provide to anyone. Since this is over a three year period and I am comparing one year to another year. This is from an excel spread sheet that I have tracked everyting from what attachemnts I have put on the truck, to how much fuel I use.

In the months of Nov 07 through Nov 08, I used 1,096 gallons for 12,706 miles. I avg 11.6 MPG at today's cost of fuel, that would be $3,179.70 US. For the time period Aug 08 (deletes done) to Aug 09, I used 912 Gallons for 13,109 miles. I avg 14.4 MPG at today's cost of fuel, that would be $2,644.10 US.
As you can see I drove more miles and used less fuel to do this. I also save on my oil changes. By changing my oil around 6,200 miles instead of the 3,200 or 3,800 miles, I use to get with out the deletes beign done.

This is summer driving, winter driving and towing a 5er combind for the year.

Jim

Blake Clark

With the stock tires I saw as high as 20.5 (hand calc) on the highway. It has since dropped to 18ish with my 35" Toyos. Still not gonna complain about 18 though.

mega-engr

You don't have a S-67 or S-67ME on that 5.9 do you?

I have definitely seen an increase of 3 to 4 not towing and maybe about 1 while towing. It is a great improvement. Jim W has some great data there!

bayshorebrawler

It can get 8mpg as long as the ckl stays off, no more egr problems, most of all getting a $2 to $5 thousand dollar bill from the dealer every year because something went out or sooted up an burned up.The smarty with full delets was the best thing i've done since i owned the truck. Draw back is i will be replacing the clutch soon, had to take it off level 3.

2171CTD

Fuel mileage gains are there as long as you dont overjoy the newfound power.

Scotty

No kidding! Its not always easy to be gentle on the go pedal.

Chubby

Last tank empty 17.5 city hwy .

Lurch519

Would like to buy a "new" truck and am trying to make up my mind on a couple of possibilities. I like the 2009 I'm lookin' at, but am a bit leary of the emmision stuff and the six spd. auto.

Chubby

I gained about 4 mpg by the deletes and the auto I wouldnt worry I pull this thing all summer

redruM Hauler

14.8 stock driving like grandpa
15.6 egr unplugged driving like grandpa

17.9 after deletes, s67 me JR 100hp tune, new clutch, but i cant drive like grandpa anymore, 3rd gear launches occur weekly

i would imagine 19-20 if i drove like gramps again