For a 2017 on-highway vehicle, check with the manufacturer before changing the oil for the first time, and if they allow an FA-4 oil, choose Shell Rotella T5 Ultra 10W-30. Shell will also be ...

Years of work in the lab and millions of miles of road testing has culminated in three new Rotella engine oils formulated to meet the API CK-4 and FA-4 oil-service categories that will start ...

API introduced the last standard, SN, in 2010. API skipped "SO" because it’s an acronym for Standard Oil, which is still sold in Canada. Its main goals for the SN era were to better protect ...