What should be noted when lubricating a vehicle?

You answered correctly. When lubricating a vehicle, it is important to clean the lubrication nipples first to prevent dirt from entering the components, which could cause wear or damage. Also, after applying lubricant, a visible layer of grease shows that adequate lubrication has been provided. These points help ensure the moving parts are well-protected and function smoothly. Mixing old and new grease is not always necessary to avoid, unless the types are incompatible—however, in most standard maintenance routines, cleaning and visible lubrication are key. This understanding helps you maintain the vehicle properly and avoid unnecessary damage or wear.