The efficiency of oil splash lubrication is greatly dependent on the speed from the gears. A common general guideline is that a tangential velocity of at least 3 m/s is needed in order for splash lubrication being successful. of lubricant is very important, and this is very vital with grease. https://gearboxoiltreatment05704.pointblog.net/detailed-notes-on-gearbox-oil-treatment-78014419