can you burn hydrolic oil in small mixes just like motor oil

Depends on what kind your talking about. As long is its mineral based it should burn fine. I have burned some in my stuff and I know other who have run it. Maybe pre filter it somehow if its really dirty.

To pre-filter it, go to a AG store of your choice and get a milk filter screen. Nice stuff. My dad put some power steering fluid through it and it came out really clean. Still using that fluid too. That was about 1 year ago.

Jon