I've never used it, but the website (from the link above) says you can use it in the crankcase.
When Added to Crankcase (Oil)
Frees sticky lifters and rings
Increases R.P.M.'s vacuum and compression
Cleans dirty parts
Removes moisture
Cleans PCV valve systems
One pint treats 10 quarts of oil (avg. 1 1/2 ounce per quart).
I assume you changed the oil immediately after?
When Added to Crankcase (Oil)
Frees sticky lifters and rings
Increases R.P.M.'s vacuum and compression
Cleans dirty parts
Removes moisture
Cleans PCV valve systems
One pint treats 10 quarts of oil (avg. 1 1/2 ounce per quart).
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