Type of Oil to Use in Husqvarna Riding Mowers

Oil Type

• All oil used in any Husqvarna engine, including its riding lawn mowers, must meet certain specifications set forth by the American Petroleum Institute, or API. Use only high-quality detergent oils with a service classification of SG-SL. Under most conditions and in temperatures above 32 degrees Fahrenheit, Husqvarna suggests using an oil with an SAE 30 viscosity rating. Husqvarna recommends against using any multi-viscosity oil, such as a 5W30, in these conditions. Multi-viscosity oils will burn quicker in the engine, which can result in poor lubrication and engine damage.

In Colder Weather

• There may be certain circumstances in which a multi-viscosity oil is preferable to a regular oil. When the ambient temperature drops below 32 degrees, Husqvarna suggests using a multi-viscosity oil with a rating of 5W30. This oil allows for easier and quicker starts in colder weather. However, when using this oil, check the oil supply more frequently to monitor the level of oil in the crankcase. If the oil drops below the "Full" line, slowly add 3 to 6 fl. oz. of oil at a time, and recheck the oil level.

Checking the Oil

• Husqvarna suggests that you check the oil every time before operating a riding lawn mower. This will allow you to closely monitor the oil supply and register any large drops in oil quantity, which would suggest an oil-burning problem in the engine. Always park the mower on a flat surface before checking the oil level. Remove the oil dipstick from the spout, clean off the tip and reinsert the dipstick. Wait a few moments before pulling it out and checking the oil level.

Changing the Oil

• Husqvarna suggests that you change the oil after every 50 hours of operation. This will keep the oil supply fresh and adequately lubricating the crankcase. If you don't operate the mower more than 50 hours during the season, change the oil at least once, preferably at the beginning of the season. Change the oil after the engine has had sufficient time to warm up, which will allow the oil to flow out more freely and remove any built-up gunk that's inside the oil. Replace the oil filter after every 100 hours of operation.