Shell Rotella has released an upgraded portfolio of heavy-duty engine oils formulated to meet the new API CL-4 and API FB-4 specifications, as shared in a press release.

The portfolio includes enhanced formulations designed to deliver advanced protection against oil breakdown, wear, and deposits, while supporting emissions systems found in modern diesel engines.

The new API specifications, which will have a first licensing date of Jan. 1, 2027, succeed the current API CK-4 and FA-4 categories. API CL-4 is backward compatible with CK-4 applications, allowing diesel vehicles and equipment to use the new oils in both current and older diesel engines where appropriate. 

API FB-4 succeeds FA-4 and is focused on lower-viscosity formulations designed for engine platforms where fuel efficiency and durability must be balanced.

Shell Rotella API CL-4 and FB-4 heavy-duty engine oils will be introduced starting in early 2027, in conjunction with API first licensing dates. Specific product availability may vary as products are introduced in phases.

The introduction of the new API CL-4 and FB-4 engine oils will also bring enhanced Shell Rotella warranty protection for advanced synthetic blend and full synthetic products:

• Shell Rotella T4 Triple ProtecGon warranty will remain at up to 10 years or 300,000 miles
• Shell Rotella T5 Advanced SyntheGc Blend will increase from 10 years or 300,000 miles to 12 years or 400,000 miles
• Shell Rotella T6 Full SyntheGc coverage will increase from 15 years or 500,000 miles to 15 years or 600,000 miles

“As diesel engine technology continues to evolve, our customers need products that protect the equipment they rely on today while helping them confidently prepare for what comes next,” said Julie Wright, Shell Rotella Brand Manager. “This Shell Rotella portfolio brings our next generation of heavy-duty engine oils to market, backed by more than 50 years of customer trust and extensive real-world testing to deliver the protection and performance today’s engines demand.”