I've let the computer tell me when the engine oil needs to be changed on all three of my Hemi Ram 1500s.
On the 2010 and 2014 with 3.92 differentials and doing some heavy towing, the computer message to change oil came up at different miles. The 2010 got a steady dose of semi-synthetic because I received free oil changes from the dealer. In the later half of the 2014's life I switched to full synthetic. Both went 100K under my ownership without any engine issues.
So far the 2019 has gone the full 10,000 miles (Change Oil message occurs at 9500 miles), probably because of the 3.21 axle and only light towing.
Best regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, factory dual exhaust, 18” wheels. Build date: 03 June 2018. Now at: 038460 miles.