DIC Avg Fuel Consumption is Growing

For the past few weeks I've been watching my DIC and my Avg Fuel Consumption growing.
At first I just rode it off to the cold weather. So I put the weather front on. But now I have gone from a modest 14.7 L per 100 km to today it peaked at 34 L per 100 km.
I think that works out to around 7 mpg
I'm beginning to think it more then just the cold weather.

What ya think?

Two things; 1. NEVER trust the DIC. Its a liar.

2. All trucks, especially diesels, lose fuel economy in the cold weather, just a fact of life.

Try calculating the fuel economy by hand a few times and see what it says.

Edit; this is assuming your maintaining the truck.