Comment Re:No. Just better mileage (Score 1) 146
It's not all that complicated, and most importantly it is maintenance free.
Until it isn't. One part of that coolant system (some sort of crossover valve or similar) failed on my Model X and damaged the front motor just a couple of weeks before its drivetrain warranty expired (so I only paid for the valve).
Also, about two weeks after I first got my Model X, it sprang a coolant leak because somebody didn't fasten something together properly in the back end of the car.
So I wouldn't call it maintenance-free. It is complicated enough that things absolutely can go wrong. They even used to recommend a coolant flush after a year of ownership, though at some point, they stopped doing that.