When we talk about lubricants, most of us immediately think of engine oil, so let’s start the discussion there. Increasingly stringent emissions standards drove oil development for several years. The last iteration was CK-4 oil, which remains the current category.
Before an oil category is finalized, it’s referred to as a “proposed category” and gets the initials “PC.” PC-11 led to CK-4. The current proposed category is PC-12. This anticipates new emissions standards proposed for 2027. Two primary things will happen: Oxides of nitrogen (NOx) will be drastically reduced, and the required service life of exhaust after-treatment systems will be significantly extended.Much
