CL-4 and FB-4 oils both represent an upgrade from CK-4 and FA-4 oils. CL-4 oils maintain traditional high temperature/high shear (HTHS) viscosity and FB-4 oils are lower HTHS viscosity. This new set of PC-12 oils have the following benefits for your operation:

• Improved oxidation: PC-12 oils are designed to provide thermal and oxidative stability. This can lead to extended drain intervals, reduced downtime, and lower maintenance costs in the long run
• Longer DPF life: PC-12 oils have tighter chemical window, with lower phosphorus, sulfur and ash limits compared to PC-11. This allows operators to extend the useful life of after-treatment systems, which ultimately reduces maintenance
• Improved wear protection: PC-12 oils provide improved engine wear protection across all viscosity grades. New lower viscosity oils will meet the same protection standards as their higher viscosity counterparts.
• Improved fuel efficiency: Of the two oils, FB-4 oils focus on enhanced fuel efficiency for newer engines.

The development of these oils wasn’t an overnight process, and likewise, the process of choosing an oil for your fleet deserves careful consideration and planning. We recommend reaching out to your lubricant supplier and original equipment manufacturer (OEM) to ensure the best results for your business.

API CL-4, API FB-4 diesel engine oils are in market.

API CL-4, API FB-4 has a global impact, but the primary applications are in the United States, Canada and Mexico.

• Reducing carbon dioxide and greenhouse gas emissions
• Enhancing fuel efficiency
• Maintaining engine durability while improving oxidation resistance, shear stability and aeration control

These improved engine designs require commercial vehicle engine oils with performance capabilities far exceeding those of CL-4 oils.