Road conditions and your kind of driving affects the interval at which your oil should be changed. Check the following list to decide if any apply to you.
• Day and night temperatures are below 32° F (0° C)
• Stop and Go driving
• Extensive engine idling.
• Driving in dusty conditions
• Short trips of less than 10 miles (16.2 km)
• More than 50% of your driving is at sustained high
speeds during hot weather, above 90° F (32° C)
• Trailer towing
• Taxi, Police or delivery service (commercial service)
• Off— road or desert operation
• If equipped for and operating with E-85 (ethanol)
fuel.

NOTE: If ANY of these apply to you then change your engine oil every 3,000 miles (5 000 km) or 3 months, whichever comes first and follow schedule “B” of the Maintenance Schedules section of this manual.
If none of these apply to you, then change your engine oil at every interval shown on schedule A of the Maintenance Schedules section of the owner's manual.
NOTE: Under no circumstances should oil change intervals exceed 6,000 miles (10 000 km) or 6 months whichever comes first.

Engine Oil Selection
For best performance and maximum protection under all types of operating conditions, we recommend engine oils that are API Certified and meet the requirements of DaimlerChrysler’s Material Standard MS-6395. Use Mopar
or an equivalent oil meeting the specification MS-6395.
American Petroleum Institute (API) Engine Oil Identification Symbol
This symbol means that the oil has been certified by the American Petroleum Institute (API). Only API Certified engine oils that meet the requirements are recommended.
Use Mopar or an equivalent oil meeting the specification MS-6395.

 

Almost all the mileage since the last change was Interstate miles so very little stop and go. You could be right about them perhaps not resetting the cycle - the last change was done after only about 2300 miles and it was before the change oil message was being displayed.

 

I don't think those conditions apply but in any event my owners manual does not have a 'A' or 'B' schedule. Reading my manual it seems to say that oil changes should be done when the oil change indicator but no later than 6 months or 6000 miles. Given that I have done only 5200 miles since the oil change before last, it does make me think that they failed to reset it last time.

 

loose gas cap