XTeer Gasoline Ultra Protection 10W40 is formulated from synthetic technology base oil, which meets the requirements of the current advanced engine oil grade of API SN. It is optimized to provide complete engine oil performance, especially for city, road, or motorway driving, even in the toughest conditions in all seasons.XTeer Gasoline Ultra Protection 10W40 provides maximum engine protection at the highest speeds. It reduces deposits and sludge in turbocharged engines by more than 50%. It reduces deposits and sludge in engines and pistons. It reduces fuel consumption. Tested with all rubber seals in the engine.