Small engine oil?

[Shawn T. W.]

Well my mower engine is $3500

Mines probably more than that!

https://www.tractorbynet.com/forums/threads/my-big-lawn-mower.591750/

 

[Hoobie]

My John Deere lx 188 riding mower I bought in 1990. This is my 36th season.Used nothing but sae30 oil. Never had a motor issue and still works well. I mow an acre lawn.
Never had any other issue either except backing into it with the truck driving the hitch through the cowling.