Change engine oil more often in colder climates. If motorcycle is frequently used for trips less than 24 km (15 mi), in ambient temperatures below 16 °C (60 °F), reduce oil change intervals to 2,400 km (1500 mi).

Water vapor is a normal by-product of combustion . During cold weather operation, some water vapor condenses to liquid form on the cool surfaces inside the engine. In freezing weather this water will become slush or ice. If the engine is not allowed to warm to operating temperature, accumulated slush or ice may block the oil lines and cause engine damage. Over time, water will accumulate, mix with the engine oil and form a sludge that is harmful to the engine.

If the engine is allowed to warm to normal operating temperature, most of the water will evaporate and exit through the crankcase breather.