So The good news is that after the change to Tractor supply oil, it did not foam and I ran it pretty hard, The bad news is my splitter and backhoe still have that crap in it and I did the front Diff and pumpkins with it also. Like I stated before I think my splitter had a cylinder full of afterbirth, seems right after that is when I noticed the change in sound of the pumps. The splitter I noticed had the cylinder extended and it sat for like 2 years outside...lots of freezing and cooling..as I get older I find myself not taking care of my stuff like I should...Too much stuff.