AGIP CLADIUM 400 is an API CD (series III) engine oil intended for use in four-stroke diesel engines operating with high-sulphur fuels, thus requiring a specially high TBN, and in particular running conditions. It is specifically recommended for application in four-stroke diesel engines operating on poor quality, high sulphur, residual fuels or frequently experiencing low temperatures in the piston-liner area.

AGIP CLADIUM 400 is also recommended for those applications where a single product is preferred to lubricate both engines operating on fuel oil and those running on diesel fuel.