have an 01 4x4 quadcab long box. I have not change anyting in a while and my mpg has dropped on the last three tanks from 20-22 on the hwy and 17-19 in town to 15 in town and 17-18 on the hwy. I have had no power loss nor any changes in my driving habbits in the last few months. I do regular mantanice oil, clean my filter ect...I have run injector cleaner through it with no change does anyone have any sugguestion?

 

Have you changed the fuel filter? Are there any strange things happening to your truck? White smoke, dead petal, rough idle, hard starts, any of that? Also check your oil level to make sure there is no diesel leaking into the oil.

 

I put an Airdog on my truck almost 2 months ago, so the filter is good. Nothing strange. Great power, black smoke (only) on demand, pedle stiff, starts great and good idle. When I get back on shore Friday, I wll check the oil.

 

you in so-cal or utah?

could be winter fuel.....

 

I have been fueling in San Diego Ca. as of lately. Do they do winter fuel in Ca?

 

I think winter fuel goes everywhere. That would be my guess. I know my mileage has droped due to that.

 

Thank you all for your help. This sucks I drive 400 miles a week and 2-4 mpg will cost me about $30-40 a month.

 

I hear ya man it does suck. Usually around May it goes back to summer fuel.

 

Mine is down about the same and was wonderin if that was why cause of the winter fuel. Although one good thing I just put a new apps on my truck because I was havin some surging issues and the couple of times i reset the apps would work and then come back, but now have a better throttle response and my mpgs did go up alittle will now how much more at next refill. But yea was thinkin the winter fuel has some to do with it too.

 

yea thats going to suck when we start getting that winter stuff its supposed to snow tomm Yay I love snow