ok this truck has sat for 3months or so before i bought it so i kinda feel that i should disregaurd this first tank of fuel, but... i only got 11.5 mpg out of it
should this be a concern??

 

Well I get that all day long......towing my enclosed car trailer. Assuming you changed the fuel filter and air filter after you purchased. Run a couple tanks and see what happens.

 

I have a 2004.5 Ram 2500 with 4.10, 4x4 and that is how much I get per mileage, between 11 and 11.5 miles. I did change the fuel filter and air filter without success. I took it to the dealer for a check up and they could not find anything wrong (no codes at all). Sorry I can not give you better news. And yes I do use the Power Service when I filled my gas tank.

 

well i am definatly getting rid of my 4.10's asap as i don't pull that heavy of a load very far my in-laws get up to 22mpg empty with theirs but it is 2wd howevery they pull a 35ft. fithwheel camper all day long at 15 to 18 mpg. a farmer here gets 17 with his oo' with 3.55's and an aftermarket airfilter \ no muffler. his idles more than anyone i know of as well so i guess i was hopeing for about 15mpg

 

Have you checked your fuel pressure yet? When the fuel pump starts to go the mileage will drop off sometimes. So, I would check into that. Your mileage does sound a little low though.

 

My truck was born with 4.10 gears. I swapped them for 3.55's a long time ago. 17-19 mpg at 75mph.

 

my '99 (auto trans) gets from 17.5 - 20.0, depending on the blend (#1, #2) and how I'm driving. The previous post of low FP is a good place to start - and one that should NOT be neglected, the IP is pretty $pendy!

If the FP is good...try running the air intake route, boots in / out of the intercooler...

..does it make good power?

 

20+ in the summer 17-19 winter with 4.10 and dually 2wd. Just stay away from the 75 mph