Make sure you are using the proper oil type and quantity for the engine in your Ferris mower before changing the oil in your lawn mower. Depending on the weather conditions you'll be operating your mower in, a different amount of oil may be recommended for your lawnmower. To choose the optimal oil type dependent on the ambient temperature, Briggs & Stratton provides a helpful chart. When selecting your lawn mower oil, take the following in mind as well: ·       Skip the special ingredients ·       Utilize detergent oils of the highest caliber, such as "For Service SF, SG, SH, SJ" or above. ·       Additionally, synthetic oils are acceptable at all temperatures and can be used.