I don't want to start an oil wars commentary but when on warranty I use XPS BRP oil once off warranty I use a 0W-40 Amsoil fully synthetic.
The 2018 Supplemental Shop Manual states if the recommended XPS oil is unavailable use a 4 stroke SAE 5W-40 oil that meets or exceeds API SM, SL or SJ service class on Page 8. You can check your operators manual as well.