Who has ditched the mechanical fan on the 3.0 and are running electric fans.
I did
What benefits did you see
None
and how much did your fuel mileage go up
None
Ditto here. The only thing I really noticed is the ability to get heat rolling quicker when it's cold outside. MPG might have increased slightly but I never checked it; if it did it wasn't enough for me to notice without a calculator.