Harley Davidson Model WLA (motorcycle, solo). Service manual (October, 1943) — page 2

LUBRICATION



and blown out through outside breather. However, a moderately driven engine, making only short runs now and then, and seldom thoroughly warmed up. is likely to accumulate an increasing amount of water in oil tank. This water will, in freezing weather, become slush or ice and. if allowed to accumulate too long, may block oil lines with resulting damage to engine. Also, water mixed with oil for some time, forms a heavy sludge of considerable acid content that is very harmful to bearings and other internal engine parts. To sum it up briefly, an engine that is used only for short runs during freezing weather requires frequent oil changes along with thorough flushing of tank to remove any accumulated sludge.