It's the winter gas...and star tron does $hit...for me anyways. You should be back to normal in the summer!

 

My MPG doesn't change much in the winter. The biggest loss in MPG is the truck sitting their for 15 minutes warming up in the morning.

 

Yep warming up for anything past maybe 2 mins max is a waste on electronically fuel injected engines. That whole warming up thing comes from the days of carburetors.

 

While this is true, not everyone wants to jump in a freezing truck on an even more frigid day.

 

I like the inside of my truck to be nice and warm before leaving the nice warm house in the cold morning.

 

Well I'm down here in sunny Florida so I don't have those issues lol

 

The level kit does not help at ALL!
I imagine your using 91oct with that 91oct tune?
When you say "I also know the hemi is prob the worst of the big 3 trucks", are you referring to Ford and Chevy? If so, then no, my 2008 Hemi Ram was better on MPG's based on window sticker information than Ford and Chevy when I shopped around. Ford got 1mpg less city, same highway, chevy got 2mpg worse city and 1mpg worse highway.
My window sticker for my Quadcab 4x4 is 13city/17highway

I use 93oct with my Superchips 91oct performance tune and Advanced trans tune option. I never change the tune out to tow and yet, while towing 6,000lbs through Mass pike up/down many hills and O/D turned off I still manage to get better than 11mpg.
This is driving at 70-75mph the entire way and rpms from 2800-3k.

Towing my empty car trailer that weighs 1600lbs, I get almost 14mpg at 70mpg. 75mpg drops it down to 12.5 so it really depends on your speed.
I don't really know what I get unloaded. Truck rarely ever goes on highway empty. But I do know it's above 15.

Empty pounding around the city I'm at 11-12.

 

Yep, short trips kill MPG!!! Those 20" wheels don't help either.

My pig is almost at 7000 lbs. with the lift, tires, winch, etc. and I rarely use the truck "around town". I usually get between 14.5-16 mpg depending on how much I'm on the interstate. Star-Tron added to 93 octane E10 will routinely give me an extra MPG or two...

 

put every thing back to stock and the MPG's will go back up. you should of knowed.

 

10MPG is good in the city, bad on the highway. And if you drive it for 20 minutes a week versus 3 hours a week.

I get 8.9 MPG in town, but I only drive maybe 10minutes per day, TOTAL. that's rough on my poor Hemi.

I should just walk to work, but at -40 Celsius, it's a bit much.