The amount of oil a Kohler engine can hold varies dependent upon the series and engine model, but most engines can hold between 0.6 liters to 3 quarts. The dipstick on the engine should contain oil up to the full mark.
The specific amount of oil necessary for a Kohler engine is specified in the engine's owners manual. Most engines should use 10W-30 Command Oil, but some can also use SAE-30 Magnum Oil. Below freezing temperatures, 5W-20 or 5W-30 oil should be used. After the first 50 hours of operation with standard oil, synthetic oil that meets the specifications stated in the owners manual may be substituted.