How often should fully synthetic engine oil be changed?
2 Answers
Fully synthetic engine oil should be changed every 8,000 to 10,000 kilometers. Compared to semi-synthetic oil, fully synthetic oil can adapt to a wider temperature range, has a longer service life, and is less prone to oxidation. Under the same working conditions, fully synthetic oil can protect the engine with lower viscosity. Fully synthetic oil is composed entirely of synthetic base oils. Synthetic oil is chemically synthesized, offering superior performance and quality compared to mineral oil refined from petroleum. It better meets the engine's requirements for oil and provides enhanced protection for the engine.
I've been using fully synthetic oil in my car for years, typically changing it every 8,000 to 10,000 kilometers, depending on driving conditions. If there's heavy city traffic with frequent short trips and quick starts, I recommend changing it around 7,000 kilometers. For smooth highway driving on long trips, it can easily last up to 12,000 kilometers. The key is to always check the user manual, as different manufacturers have different recommendations—some German brands, for example, have stricter requirements. I make it a habit to check the dipstick monthly; if the oil turns black or gets too thick, it's time for a change—don't wait for the warning light. Also, pay attention to oil temperature, especially in hot summers or under heavy loads, as high temps degrade oil performance. Changing it sooner ensures better engine protection.
