What are you doing, locking it up in the winter? Shame on you!
Well, yes, it goes into storage mostly. It don't get warm driving it to or from work (14 miles) in the winter..
so I drive the van which gets warm in less than 2 miles in winter.

If the weather
is bad, I drive the truck.
Its 4x4 so its better in the snow and ice, but it don't warm up much faster than the TDI
.
Keeping the salt off it is a good reason too..

But mostly my driving
needs have changed over the years. On most of my longer trips, I am hauling "stuff" and 3 or 4 people for a vacation outing.. This year, Branson Mo in 2 weeks, Dayton OH in about a month and a half, Pittsburg KS in Sept. Maybe 1 week driving across Iowa supporting a bike ride with 10-20 bike riders in our group..otherwise..
Most of these trips are with 2 or 3 bicycles, camping gear, cooler and gas grill... you get the idea!
I would also like to attend TDIfest this year, if work and family stuff permit.
It would be good to get the TDI out and drive it a bit.
By the way, not that it means anything, but I have been running 2 of my 3 diesels on Rotella T synthetic 5w-40.
The TDI and the Cummins in the truck. The MB gets regular Rotella 15w-40.
The Cummins engine has 125,000 miles on it, tuned to about 410HP and around 900 F/LB torque for just under 100k of it.
The van, a gasser

has close to 70K miles in 3 years, and gets Mobil 1 5w-20.
Drive ON!