I usually do basic car service myself. Things like oil and filter change, replacing break pads and spark plugs, topping up cooling liquid. The car is 10+ years, way beyond warranty.
Pre-COVID I drove around 20,000km a year, which makes 6-monthly service to be about every 10,000km as in service manual. However, this year I barely drove the car. The last time I filled it up with petrol was over a month ago (vs every week pre-lockdowns).
According to time, the oil is about due for a change. According to km - still plenty of time. Does oil go bad and I have to change it every six months? Or can I wait when it's 10k km from the last change?
What sorta car/engine/mileage?