I commute about 125 miles per day. It would be economic insanity to buy a new car, or a high priced used car. Depreciation can easily be as big a cost as fuel if you buy a high priced vehicle and put tons of miles on it.
I looked long and hard at VW TDI's. The things that scared me away were, high used price and cam belts breaking or needing to be replaced every 60K miles (I know it is longer now). Diesel priced higher than gas almost 20-30% here. Could not fit it into my parameters.
I love the Prius, but can't fit my family in it easily. Also a bit shy of maintenance with the hybrid system, and battery replacement. I do like to do my own mechanic work as much as possible. I would still like to own one despite the aforementioned stuff.
If I had a $100,000 to spare, I could buy a Tesla and not buy any gas for my commute, and with the leftover money I could get a decent solar panel setup for my home to not have to pay the electric bill. Only a $100,000 to become relatively energy independent.
Or I could bring an old electrolyzer and fuel cell home from work.....with a few solar panels.....hum.