Hey all finally back from my xmas trip back home, anywho here were my highway MPG w/different Smarty settings for those of you that were wondering!

Stock-17.8 ~ 544.1miles
40 HP-17.1 ~ 528.2 & 520.3 miles (2tanks)
70 HP-18.6 ~ 591.1miles

This was my hand calc results over the whole trip I ran 40 HP all the way up there thinking the economy setting would do the best but tried the stock and 70 HP setting just so I could get results and was happy to find the 70HP did best. I tend to get best mpg running 65-70 mph but ran between 85-87 mph on cruise because thats how fast everyone else was goin .

The 70 HP setting was showin 21.3 at 70mph on the lie-o-meter which I usually find shows 2mpg higher so I assume a guy could break 19 using the 70 HP setting runnin 65-70.

Also the truck tends to do alot better in higher altitudes... on the way through Louisiana the lie-o-meter would show better mpg when gettin away from the coast and lower when coming back down towards it..

 

Good Job. That's some helpful info.

 

Cool, so it looks like Jr gave you 1 mpg better plus a hole lot more power to go along with it. I need to run my truck in stock mode for 3~4 days to & from work (170 miles/day) to see what the overall difference is compared to the 2/2 setting I have been running (best mileage out of the ones I tested... see the thread in the sig for details).

do you still have your cat in place?

 

yeah unfortunately the CAT is still there I was gonna change it when I went home (my bud runs an exhaust shop) their was a guy that came in with the same truck wantin straight pipe so I was gonna cut it open with the plasma and gut it so it'd look like I had one...but he couldn't drop his truck off till after I left....

Why was ya askin?

 

if you do the cat delete with the open exhaust, you'll loose mileage. been there, done that. had a 30" mag with a cat delete and lost a consistant 1~1.5 mpg. added the aero where the cat was and gained back 1.0~1.25. the motor ran way different after the addition of the aero when compared to the straight thru exhaust. if your towing alot, striaght thru is the way to go to control egt's better. for a daily driver, ditch the cat and gowith an aero 4040 where the cat used to be.

 

thats where the name I got came from I ran aero on my last truck I'll leave the cat for now I gotta save some cash for 35"s right now

 

yeah those will also kill your mileage... sad as it is.

 

yeah I know but dammit they look good...

 

I would say try it on 100hp but you got the auto right? Mine does about 1mpg better than normal on 100HP if I drive like my grandpa but just normal driving like I do it holds steady to what I always got before 18.5 Normal driving for me is 75/80mph on the interstates 70 mph in 55's rural areasif I can get away with it. No redlight racing or anything like thatI behave in towns. Tried the 40HP once just didn't like the power anddon't know what it did for mpg's.Never tried 70hp towing. I just like 100 so muchthat's where I'm gonna stay.

 

Yeah I got an auto, you should check out my other post....lol

https://dodgeforum.com/m_1108595/tm.htm

The 70 HP setting did great for my milage but I've run into a problem I can't say its the programmers fault the guy that had it for 15k before me may have ran it hard or maybe its my Talladega Nights Slingshot passsing technique or Nascar merge onto the highway....