The display/wrench indication will come on before reaching the maximum interval of 16,000 km (10,000 miles), or 12. Mazda3 service intervals by mileage The vehicle calculates the remaining oil life based on the engine operating conditions and lets you know when an oil change is due by illuminating the wrench indicator light in the instrument cluster.
Mazda 3 Service Manual - Oil Seal (Differential) Replacement [A26 M R
The display/wrench indication will come on before reaching the maximum interval in travelled distance or elapsed days since the last maintenance, or if the engine oil has deteriorated.
I'm planning to start worrying about the powertrain fluids at 35k, probably change them before 40k
The rear diff has a clutch pack with fluid that seems to be unobtanium and also. You need to change it every 25,000 to 40,000 miles (40,000 to 60,000 kilometers) It’s recommended every 90,000 miles (150,000 kilometers) Look up the 2024 mazda mazda3 oil type, capacity, filter, and drain bolt specs
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