is a range of superior quality detergent trunk piston engine oils containing different levels of alkalinity. It is a range of extra high quality detergent lubricants recommended for highly rated, medium speed trunk piston engines running on residual fuel with a maximum Sulphur content of 4.5% weight. The detergency level offers exceptional cleanliness including piston under-crown. Furthermore, it is suitable for plain bearings of turbochargers, for most reduction gears, shaft bearings, stern tube and seals.