bad fuel milage... help...
 

I have a stock 01 7.3 that when I bought it 4 months ago it was getting like 14 mpg... lately it has dropped down in the 11-12 range... what do I need to look at to get this back up higher? I will be getting a chip in the first of the year but until then what can I do?

fuel filter and oil change is the first two things i'd start with

oil was changed about 2000 miles ago... and was going to change the fuel filter monday...

winter blend fuel will drop mpg. mine is down to 20-21 now. i was getting 22-23.

There are many vendors on here that can help you out. My thoughts would be, combined with Bobcat67's suggestions, are a good intake (I run a K&N), and free flowing exhaust (I run MBRP 4" duals, but there are many that are ALOT cheaper).

flo-pro makes a quality system for the price in my opinion

Flo-Pro is a great system! I ran one on my '96 til I switched it over to stacks. If I remember right I paid just less than $300 for a simple turbo-back.

drops in fuel mileage can be caused by a few things. like mentioned above, winter diesel will yeild less mpg than your standard diesel fuel. also dirty oil , dirty fuel filters , and dirty air filters dont really help things either.

if you've noticed a lack of power as well , you might want to check on your up pipe gaskets, air to air leaks , or possibly even brakes seizing on.

it is the Winter diesel that is causing your drop in mileage. Does your truck get a little more idle time to warm up before u drive?

I let it warm up before I drive off... the air filter was changed when I changed the oil (about 2000 miles ago)... and I kind of lied... it does have an 4 inch exhaust with a turbo muffler...

If it warms up tomorrow (not likely due to snow) I will be looking at the fuel filter.