Just changed over to T-6 Rotella 5w-40 it has the Jaso rating. Autozone has a deal on the 5 gallon buckets at @104.00 plus a $25.00 rebate on this makes it a great deal. Limit 2 rebates which I took advantage of since my truck has the Cummings diesel and my JD 1020D tractor will also love this oil. Don't think it will be too heavy for the Kawasaki which calls for 10w-30.