Classic Running-In Oil (SAE 30): for initial running-in of re-built engines.  This product is formulated for running-in on the road but it can also be used for test-bed running-in.

CRO Competition Running-In Oil (10W40):  for test bed running-in for up to 4 hours. Can also be used for light operational duties up to 500 miles.  This is an advanced formulation which meets the needs of the professional engine builder.

Running-in oils should be used for the first 500 miles after which the filter should be changed and the oil should be replaced with an appropriate engine oil.