Check out this link from the Kawasaki site. I strongly recommend using the manufacturers own or recommended acceptable lube oils particularly while the engine is still on warranty.
K-Tech
This is the first that I have seen a synthetic blend available from Kawasaki in 10W30, their 30 weight oil is still dino oil and I buy it by the case at my local power equipment dealers along with Kawi brand oil filters as this engine has a 36 month/500 hour warranty. My Hustler X-ONE/Kawi/ FX730V runs for 8-10 hours at a time in season and I run 30 weight in it, 200 rough hours on it as it is used in a cemetery where parts of it are 200 years old.
Synthetic oils have a very strong detergent quality to them and because of this I don't recommend the use of full synthetic engine oils in any engine until it has around 100 hours on it and fully broken in.
Mad Mackie in CT
Retired power equipment, auto, marine, and aircraft mech, welder, fabricator, machinist, now old phart!!!!:laughing::laughing:
Read the owners manual for your specific engine or machine!!!! I hope that my point gets across!!!!