I ran amsoil for many years prior to owning a diesel. We used the dominator premix for our race bikes and then in the engine and clutch fluids in the thumpers. Never had a problem and the pistons looked brand new. IN our sleds, I started running redline then switched back to amsoil to see on my turbo sled and it held up very well. I'm switching my truck over to amsoil to see if I notice anything different. As compared to BG oil, I couldn't tell you. I've never ran that oil. This is my first go around running synthetic's in my truck. Only reason why i'm doing it is because they offer a synthetic in a 15w-40.