ExxonMobil unveiled its lineup of enhanced Mobil Delvac diesel engine oils that are designed to meet or exceed the CK-4 and FA-4 categories of API Proposed Category 11, known as PC-11, specification.
Beyond the API 'Donut:' Putting a Premium on Oil
Every fleet knows how important oil is to the proper operation of their vehicles, but how can they determine if upgrading to a premium oil makes sense for them?