I have to confess I am overkill on fluid changes. I dump the transmissions at 25k and all the fluids at 50k. I have never had a failure going back way before the Super Duties and they have a cumulative 325,000 on them.
"A pessimist sees the difficulty in every opportunity, an optimist sees the opportunity in every difficulty” ---Sir Winston Churchill
"Political extremism involves two prime ingredients: an excessively simple diagnosis of the world's ills, and a conviction that there are identifiable villains back of it all." ---John W. Gardner
“You can’t go back and change the beginning, but you can start where you are and change the ending.” ---C. S. Lewis