The correct oil can reduce friction losses in an engine to a minimum. To find the correct oil, factors such as engine usage, ambient temperature, climate, location, and engine design should all be considered. Lubrication plays a critical role in the life of an engine. Without it, the engine would fail within minutes, meaning keeping a close eye on it during flight is important. The oil system in an aircraft engine is very reliable and only requires minimal maintenance in the form of regular oil and filter changes and visual inspections. Having a basic understanding of the engine system is critical for professional and private pilots alike. In this blog, we will discuss the basics of oil maintenance.