I am confused about the Oil Change Reminder and how it is determined. My 2012 Journey with 3.6-L Pentastar engine and 6 speed tranny announces at exactly 3500.0 miles for an oil change, for every oil cycle. My 2015 Town&Country with 3.6-L Pentastar engine and 6 speed tranny went over 8500 miles and never gave an oil change message, so I changed it anyway. My question is if the vehicle is to determine based on engine use, stress, heat etc, why do two similar drive trains have such a different interval, when I drive the both the same way, in fact I pull a pop-up trailer with the 2015 T&C which should by all rights make the cange interval shorter not longer.
I think Journey indicating an oil change at 3500.0 miles is not correct, the manual says 8,000 max. What is the difference in the two Mopar machines (besides the oil filter)????