Shell Helix Ultra ECT C3 is a fully synthetic engine oil featuring advanced emissions-compatible technology. It is designed to help keep diesel particulate filters clean, maintain engine performance, and reduce engine friction for enhanced fuel economy. This formulation protects gasoline engine exhaust catalysts and diesel particulate filters from ash build-up, preventing blockages and performance reduction. Shell Helix Ultra ECT is suitable for modern gasoline, diesel engines with particulate filters, and gas engines. Key specifications and approvals include ACEA C3, API SN, MB-Approval 229.51, 229.31, BMW LL-04, GM dexos2TM (License number GB2C0710014), and Chrysler MS-11106. Please note that product specifications may vary by region and availability.