You should follow the maintenance schedule stated in your owner's manual, not the schedule from your Mazda dealer! Since you have a 2016, make sure to turn on your oil life monitor by selecting "Flexible" OCI based on Schedule 1 Flexible Maintenance Schedule on Oil Change. With Flexible OCI your Maintenance Monitor shows "%" of your oil life left, and you change oil when "Oil change due" message is displayed. It gives your OCI up to 12 months or 10,000 miles. With Mazda moly oil and OEM oil filter, this is the best to stretch longer OCI than dealer suggested 4,000~5,000 miles while you won't have any oil-related warranty concerns. I personally change oil earlier than Maintenance Monitor indicated and reset the oil life monitor to start over after each oil change.