I polled some of the main oil filter manufacturers on whether their products meet the USCAR-36 specification required by many American manufacturer's user manuals. Here are their responses:
- Mann+Hummel (owner of Purolator and WIX brands): “Yes, Purolator is Uscar-36 certified. I can’t think of any major filter companies that are not.”
- First Brand’s (Fram’s) response: “Our filters align to the performance criteria for SAE / USCAR-36”.
- Royal Purple: “Our Royal Purple Extended Life Oil filters align with the USCAR-36 specification.”
- AMSOIL: “Our filters satisfy USCAR-36”.