I posted here before about bad fuel economy but now I am worried. I've been hand calculating for several tanks now and have seen my mileage keep dropping.

My latest fill up was 10.9 mpg! [:@][:@][:@]
I am slowly approachingthe mpg Igot in the Chevy van (full of tools) I had before I replaced it with this truck. I really hope this is a result of winter fuel and not something else. I run the PSD/MMO brew and try to keep under 2K on acceleration, changed fuel filter, Airaiddrop in but I am now at a loss for solutions to this.

Is there something I am missing or am I driving this truck wrong?

 

I think your driving wrong, Put your foot in it and youll get around 9-10. But seriously, That does sound off. Mine is still new and im getting around 13-15.

 

Mine is BRAND New still on the first tank and I am getting 17 MPG and I don't drive so slow.

 

what else have you done to your truck? lift? big tires? open exhaust?

 

Put a load on herdump a bunchof injector cleaner in her (PSD/ gen47?) find a big hill and put the pedal down!Winter fuel will cause a drop!Diesels need to work hard puttin around empty yer gonna get lousy mileage. Bigger rubber will help get her working harder! As for "opened exhaust" that won't hurt either... turbo will look after that "back pressure". If this fails to get mileage up try getting the ECU reflashed, worked on me brothers' 05 QC made a huge difference!

 

I don't drive with a load in it very often, I pull a 5000# trailer maybe 2x a weekabout 30 to 60 miles max, the rest empty.

What is "getting the ECU reflashed"?

I haven't done any other mods yet since I don't want to mess with the warranty. I am running stock tires and still have the stock exhaust with cat

 

ECU reflashed is done by the dealership. It will take about 30 min. if they aren't busy. This will not void warranty. I had mine redone because reverse lights weren't coming on.

 

1027k last full tank . I love it

 

9.2 plowing

 

1027 K last full tank?