What type of oil should be used when refilling crankcase oil?

Using oil of the recommended type and viscosity is essential for maintaining the performance and longevity of a small motor's engine. Each engine is designed to operate optimally with specific oil characteristics that meet its lubrication requirements. The viscosity rating of oil determines how well it flows at various temperatures, impacting the engine's ability to start and operate smoothly under varied conditions.

When an engine operates with oil that does not match the recommended viscosity or type, it can lead to inadequate lubrication, increased wear on engine components, and potential overheating. This can ultimately result in severe engine damage and costly repairs.

Following the manufacturer's specifications ensures that the engine runs efficiently and reliably. This is why it is crucial to consult the owner’s manual or service guide for the specific oil requirements before refilling the crankcase.