The mods I have installed are:
Tires @ 50 psi
EV Switch
Lower Grill Block
Enginer 4kWh PHEV conversion
Block Heater
Bridgestone Ecopia EP100 Summer Tires
Pirelli Winter 190 Snowcontrol Serie II Winter Tires
0W-30 Mobil 1 synthetic motor oil
Smooth wheel covers
For most of this winter I did not have my garage available, and thusly while my wife was driving she didn't like to plug in the car's block heater. So, that there is a big one. The winter tires also hit the mileage a fair amount. I have not blocked my upper grill yet. I'm sure it would be worth it, I just haven't done it.
I am very much looking forward to being the only main driver of the Prius to see what can really be done with the car. As of right now, I've been hitting high 50s and its still been pretty cold out. I can't wait for summer.
