Yea, the 3 month 3000 mile oil change interval was conjured up over a half century ago. Numerous advances in oil refining and production, as well as highly advanced detergents and polymers make it no longer necessary for the 3K interval. Unless the vehicle is driven in the most extreme circumstances and conditions. Ford changes the oil on my girlfriend's Fusion, and they do it every 5K, with a 5W20.

I work for a fleet management company, and the interval for oil changes on the fleet is 4-5K, as the condition warrants, or 200 hours of run time. Even broader intervals for synthetic. And we all know how fleet vehicles are driven (with the utmost regard and care, yea right!) We seldom have any issues with that interval.

And, yes, I plan to change my own oil in the Challenger. I bet it will have that plastic splash guard underneath like the 300/Charger/Magnum do, and it needs to be removed to change the oil and filter.