API PC-12 engine oil categories CL-4 and FB-4 are advancing toward a 2027 launch. Here’s what the changes mean for fleets, ...

January 1, 2027, will be the first license date for two new heavy-duty engine oil categories, if all goes as planned.

The physical and chemical differences between these crude types determine how easy they are to refine and their market value.

At-a-Glance: Heavy oil is a dense, viscous petroleum fluid (typically 10–22 °API) enriched in resins/asphaltenes with low gas content, formed when originally lighter oils are altered after charge by ...

South American nation’s tar-like oil is what many Gulf coast facilities were built for but ramping up production to 3m barrels a day will be a long game ...