An advanced series of monograde high-performance dieselengine crankcase oils formulated to counter the toughestconditions found in diesel engines, from naturally aspirated toolder turbocharged units, used in contractor, agricultural andcommercial automotive vehicles on and/or off the road. Theyhave excellent resistance to bore polishing, a high level of wearprotection, efficiently control sludge and deposits providingsuperior engine cleanliness at extended oil drain intervals.