I have a question on what after run oil is a good one to use. My dealer has only a spray kind and it is a real pain in the butt. I clean and clean my head but im never sure if I get all the dirt/grime out, so when I shoot the after run oil it hits the side of the head and im always worried about blowing junk into the motor. what is a good afterrun that is in a droper unit? Thanks for the help!