First oil change on new Ram.

Ok. A fleet vehicle agency my old employer leased from demanded first oil change be done at 500 to 750 kilometres. You read it correctly. Their claim is,less engine trouble at the +200,000km mark. Through the repair tracking ,costs are reduced.
Nother story
2014 chevy pickup
Dealer changed oil from new. New purchase-decal showed service at 5,000.
Next one,another 5,000 and so on.
Almost 50,000 and came to me for service. I suggested 10,000 for full synthetic.
“Dealer said 5,000 for warranty” she said.
I called “BS!”
Opened owner’s manual and it stated 12,000 average by oil life monitor.
So,9 oil changes versus 5 by 50,000 km’s.
She was quite taken aback to say the very least. Dealer got an earful at her next visit.