A lawn mower typically takes SAE 30 oil for warm temperatures above 40°F (5°C). For varying temperatures, SAE 10W-30 is recommended as it provides versatility across a wider temperature range. Synthetic oils such as SAE 5W-30 offer superior protection in cold and hot temperatures (from about -20°F to 120°F) and can improve engine starting and reduce oil consumption. Always consult the lawn mower's manual for specific oil recommendations and use oils classified as API service SG or higher.
