According to Homedepot.com, the recommended Lawnmower Oil for a 21 in. 190 cc Gas Walk-Behind Lawn Mower is SAE 30.
The referenced 21 in. push mower offers 6 cutting positions to cut grass down to size, with high rear wheels, making it ideal for use on uneven terrain. Its powerful Briggs & Stratton engine (190 cc Briggs & Stratton 675ex ReadyStart OHVengine) delivers solid, efficient power to tackle the yard.
Check out Briggs & Stratton's tips and procedures for checking and changing oil and oil filters here.
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