First oil change on new Ram.

I also have a 2017 ram I am going to take it in at 3K for the first oil change, since its free.
After that when the change oil light comes on.
Manufactures have a warranted
for a reason, they are not stupid.
The dealer will do my oil changes until warranted
is up.

On my old 03 Wrangler, change oil ever 10K miles, spin the filter off a 5K with synthetic, keep driving.

Old mopars, change it 1,000 since they don't get driven much.