Kohler SAE 10W-30 Universal Engine Oil ?

[Gravely20G]

Is Kohler SAE 10W-30 Universal Engine Oil a full synthetic oil?

Can I switch from Mobil 1 20W-50 Motorcyle full synthetic to the Kohler SAW10W-30 Universal Engine Oil without doing damage to the Kohler Magnum 20HP engine in our Gravely 4-wheel LT?

Reason I am asking is the engine is "noiser" at idle after running for 2 hours at full throttle mowing grass than than what it sounds like at idle during a cold startup.

Thank you for your experiences.

 

[MGregoir]

The noise is because the oil has thinned out (as it should when it runs in an air cooled engine), and oil pressure/film thickness has decreased some. I would not worry much.