My wife has an 06 jetta tdi and it gets 43-47 mpg. Thats the good, the bad is that diesel is 40-50 cents more per gallon. VWs are an absolute 



to work on, i invent new swear words everytime i have to do something. The germans are so smart they needed to invent their own fastner, its called a triple square. Its basically a 12pt torx. A couple winters of salt and you can count on taking these stupid bolts out with a grinder, torch, drill, or a combination of the 3.
They are the worst front wheel drive vehicles in the snow. All jettas, not just diesel ones. I think the car is too light and the wheels are too wide. We have a set of winter wheels and aggresive tires that get put on if there is any chance of snow. And i put 100lbs in the trunk for good measure. They are really that bad.
We have never had an issue with cold starts, even with this cold winter it always starts right up with no trouble. Not sure how -30 would be but i wouldnt be afraid of it.
Now, my wife loves the car and it has been very dependable but we wont be getting another. Parts for VWs are very expensive, oil changes are expensive, and normal mechanics cant work on them. Even something as simple as an alignment needs to be done at the dealer. A local shop here has a state of the art alignment machine and thay cant do VWs. As for suggestions ive never had a honda that wasnt excellent in the snow and great on gas. I also heard the hyundis and kias are getting great milage and have really good warranties.
Looking for a Bassani silencer for a 2nd gen tecate, the style with the movable mount. 1st gen will work