[CREWZIN]

I'm not any kind of certified anything, but have worked in 2 full service garages and messed around with cars for over 45 years. Used to be dropping the pan, throw a new filter in and top it up was the norm. When the B.G. process came along with the flush system I started using it and continued with it for longer than I can remember on countless customer and my own cars. Never had a problem.