With absolutely no foundation, I believe that 100,000 miles are easily obtainable on the Mitsubishi motor.
With the high quality synthetic oil available and the recommended oil change intervals, the engine should hold up. By abiding by the book- antifreeze, airfilters, belts, etc, change out will have be done too.
Driving habits obviously will influence the longevity too.
As for the tranny and other items of consequence, that remains to be seen.
This is my belief and I hope I'm right.
When the time arrives and serious work is needed, I trust that other than dealer mechanics will be there for me.