These engine oils have the API CF/SF specification for passenger car engine oils and are perfectly suitable for the more traditional car portfolio. The API CF/SF specification on our engine oils refers to engines that service typical of certain naturally aspirated, turbocharged or supercharged diesel engines operated in moderate to severe-duty service, and certain heavy-duty gasoline engines. The higher SAE 40 grade is suitable for areas where the engines operate under high tropical circumstances. Concerning formulation these engine oils are made of natural, paraffinic base oils group I combined with special additive packages.