The oil you use can drastically effect the need for a catch can. I added a catch can to my LT1 in my Denali and I get almost nothing after months using Amsoil. Other guys I talk to using other oil have to drain almost weekly.
TRUE, I used torco for break in, I am running RP XPS 10/40 and very little if anything is there. Ill try Amsoil next, I have been told to change oil every 20 hours. I think the big issue is oil temps and water/fuel caught in oil. Lots of guys refuse to push oil temps to 215plus when they need to.
