Castrol Running-In Oil 2 is an initial fill oil for reconditioned engines and a second fill oil for new engines. Running-In Oil 2 should be used as follows:
NEW UNITS Naturally-aspirated engines Change initial fill at 1000 miles (or point recommended by engine manufacturer) for Running-In Oil 2 where it can remain for up to 6,000 miles before changing to service oil. Turbocharged engines As for naturally aspirated diesel engines, but change to service oil after 2,000 miles max.
RECONDITIONED UNITS Naturally aspirated engines Initial fill with Running-In Oil 2, change at 1,000 miles (again for Running-In Oil 2) and change to service oil after a further 6,000 miles. Turbocharged engines Initial fill with Running-In Oil 2, change at 1,000 miles (again for Running-In Oil 2) and change to service oil after 2,000 miles max.
