This is not my car although I have the same model but my concerns prompted the owner to carry out an oil change and analysis at only 3,700 km for his 2021 model. The scheduled interval is 120,000 km. I changed my own at 19,400 km on my 2018 model but could not easily obtain an analysis.
The coloration of the used oil is black, almost as dark as black coffee. I'll also mention that this is a splash-lubricated single-speed 2-stage parallel shaft reduction gearbox with steel helical gears and a conventional open diff. All bearings are ball except the output shaft which uses tapered rollers. The housing is cast aluminium. There is no magnetic drain plug installed, nor any internal magnet as best as I can determine from a teardown video. The oil is a 70W GL-4.
The particulate and iron content is no surprise based on the absence of a magnet and I'm relatively certain that's also why the oil is black. This gearbox does not run hot, barely even warm. The aluminium is of great concern because IMO it indicates outer race spin. The silicon level is a mystery. Although the gearbox is conventionally vented, this particular car has not been used on dirt roads.
Technical comments welcome, please!
The coloration of the used oil is black, almost as dark as black coffee. I'll also mention that this is a splash-lubricated single-speed 2-stage parallel shaft reduction gearbox with steel helical gears and a conventional open diff. All bearings are ball except the output shaft which uses tapered rollers. The housing is cast aluminium. There is no magnetic drain plug installed, nor any internal magnet as best as I can determine from a teardown video. The oil is a 70W GL-4.
The particulate and iron content is no surprise based on the absence of a magnet and I'm relatively certain that's also why the oil is black. This gearbox does not run hot, barely even warm. The aluminium is of great concern because IMO it indicates outer race spin. The silicon level is a mystery. Although the gearbox is conventionally vented, this particular car has not been used on dirt roads.
Technical comments welcome, please!