I agree with your second sentence, but still wonder why they chose to stick with gas rated oils. Kawasaki's own branded oils are SL rated, not fuel saving, and marketed as synthetic blend, "contains zinc", suggesting more zinc than today's SN/SP oils?It seems that Kawasaki stuck to grades that are available in gas rated motor oils. But anything between 10w30 to 20w50 should work. I run 5w40.
I don't fret over this stuff, but wonder in BITOG OCD fashion. I looked on the internet a bit, and numerous pro lawn forums suggest that 15W50 or even the 20W50 are the popular recommendation. My local Exmark dealer (Kawasaki engines) told me most of the pros in my locale are using the 10w40 (so they say). I simply cannot imagine using a 20W50 in Michigan.
Kawasaki KTECH™ 4-Cycle Engine Oil | Kawasaki Engines USA
Designed to keep today’s high-performance, low-emission engines operating at peak efficiency, KTECH 4-Cycle Engine Oil also contains zinc additives that help prevent excess wear on engine parts.
www.kawasakienginesusa.com
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