Usage of Crow is all dependent on your bowling stats. and type of lane condition it's used on plus layout.
For me, I found it to be not for light oil at all. It flares a ton with a 4.75" pin to PAP pin above and for me is good on medium house shots. VBP states it's a medium ball on their website.
A new EBI Hammer produced Blue Hammer would be a better light oil urethane choice IMO.
My stats. are in profile.