Castrol Magnatec 10W30 is part of the magnatec range of Castrol oils that provide instant protection from startup.  Castrol Magnatec Professional 10W-30 is formulated for most types of new Australian, Asian and American passenger, 4WD and light commercial vehicle engines petrol or gas, turbocharged or naturally aspirated, which are designed to run on lower viscosity fuel efficient engine oils.Castrol Magnatec Professional 10W-30 is a part synthetic premium performance Fuel Efficient SAE 10W-30 engine oil that contains intelligent molecules that cling to your engine, forming an extra layerthat protects during start-up and beyond.  
 
Reduced engine wear at startup
Cleaner engine operation
Controls excessive oil consumption
Stable viscocity over oil life