Most are transitioning to SAE 10w-30, but depending on equipment builder recommendation for temperature conditions, other viscosity grades in SAE 5w-X and even 0w-X are being considered.
as well as SAE 10W-30 and 10W-40, among others. It turns out that O'Reilly motor oils are priced cheaper than their big-name ...
SAE 10W30 will sync with the components used in the vehicle. Any higher/ thicker grade(10w-30), might have constraints in the oil flow through the tighter tolerances maintained in the construction ...