The performance of oil splash lubrication is greatly dependent on the speed of your gears. A standard guideline is a tangential velocity of no less than 3 m/s is necessary in order for splash lubrication to be productive. of lubricant is very important, and this is very important with grease. https://gearbox-oil-treatment26047.thezenweb.com/the-basic-principles-of-gearbox-oil-treatment-72169517