First Oil Change

[den052]

I just got the Scag Liberty with the Kohler 22hp engine and now have 9 hours on it. I need to change oil and filter, can I use syn oil? Can I use Mobile 1 oil in it? Should I use 10w 40 oil?
Thanks for any suggestions on this, such a great mower.

Absolutely. Synthetic oils resist thinning out with air-cooled engines, and don't thicken up when cold as much. The wear resistance is superior with them. I went to a diesel oil seminar and the expert talked about the advantages of synthetic oils

I talk with authority here.

I'm a retired MASTER light and heavy truck mechanic for over 50 years

 

[TheWB]

I run 20w50 syn in my zero turn, no issues at all.

 

[MParr]

It doesn't really matter whether you use synthetic or conventional oils. Lots of commercial guys change their oil at 50 hours. Residential owners usually yearly or 100 hours. That's, if they follow the engine manufacturers recommendations. It's very important to keep the air filters properly maintained and oil level at full.