https://www.youtube.com/watch?v=FXqkOZAkXZw
I'm only half way through right now but the answers Valvoline gives seem to promote 3K mile OCI as "cheap insurance" and that using a different grade than what the manual says = blown engine.
I'm only half way through right now but the answers Valvoline gives seem to promote 3K mile OCI as "cheap insurance" and that using a different grade than what the manual says = blown engine.