I only have 6k miles on my 2014 TDI Jetta. during the winter I was getting about 46 mpg now I get 38-39. Is there anything anyone can suggest for me to try and get that back up or think of anything that could cause that?

 

Welcome to the forum.

Not really, is it still under warranty get a dealer to check it out?

I would also suggest you also join VW TDI forum, Audi, Porsche, and Chevy Cruze diesel forum its a great TDI forum.

https://volkswagenforum.com/forum/ne...gnature-34185/

 

Youre probably driving it harder now because during the break-in time, you have to drive it slowly. And slowly means that the mpg+.