Short commutes like yours are extreme conditions for a gas engine. The engine will not get up to full operating temperature even in the summer. (don't believe the temp guage, it's designed so you don't worry about things like this).
If I were you I would consider taking a scenic route to work, that's what I did when I used to live 2 km from work and I didn't feel like walking or biking to work in snow.
With short driving it's important to follow the time interval for maintenace instead of mileage.
With your habits buying an Insight does not make economic sense but don't worry when 99% people choose a vehicle to buy they don't make the most economic decision anyways. For you buying an Insight and driving it is making a statement and gives you a warm fuzzy feeling inside. Nothing wrong with those reasons.
If I were you I would consider taking a scenic route to work, that's what I did when I used to live 2 km from work and I didn't feel like walking or biking to work in snow.
With short driving it's important to follow the time interval for maintenace instead of mileage.
With your habits buying an Insight does not make economic sense but don't worry when 99% people choose a vehicle to buy they don't make the most economic decision anyways. For you buying an Insight and driving it is making a statement and gives you a warm fuzzy feeling inside. Nothing wrong with those reasons.