Amodimethicone, Castor Oil for Sheen?

According to this study, amodimethicone and castor oil are among certain substances that "increase the luster of hair." Has this been true in your experience? Does castor oil give you sheen? What about amodimethicone-based products? Do other oils/substance give your hair more sheen or shine?

MORE READS:
AMODIMETHICONE + OTHER CONES
CLEANSING AGENTS FOR CONES