Q: What will be the oil drain interval recommendation for the CK4 oils?
A: The AMSOIL Heavy-Duty product line will be OEM service interval with the capability of extended intervals with oil analysis substantiating it.
Our Signature Series Max-Duty product line will be the following:
Heavy Duty = 3X OEM interval not to exceed 60,000mi, 600hrs, or 1 year whichever comes first.
Turbo Diesel Trucks = 2X OEM interval not to exceed 25,000mi or 1 year whichever comes first.
Gasoline applications = 2X OEM interval not to exceed 15,000mi or 1 year whichever comes first.
All of these can be extended if oil analysis substantiates the extension.
