So I will try to make it as short as possible. 2 years ago the skid steer died with a broken pilot fuel pick up issue....one month turned to 24. S0 I changed all the filters and fluids and drained the old diesel and had a bypass set up to get it running. I cranked on and it it fired pretty quick but ran. I ran 2 5gallon cans of diesel through it sitting with Sea Foam and Howes mixed in as it ran slightly rough but was getting better and better the more it ran. Smokey at first but ran pretty smoke free by the end of the sencond 5gal can. I also was working the hydraulics which was causing it bog down when lowering the loader arms. Son (5th year Engineering student) was helping me. We went and got more diesel and ran another 5 gallon can through it and switched to the 4th can we were going to run through it before actually putting it all back together and running it around. Soon after the switch the engine a sudden bogging down sound and started blowing smoke and running poorly. I turned it off and we checked most things and then discovered the can of fuel was milky in clarity. None of the other cans were this way and the can also had a bunch of rust like crap in it. We had used this same can earlier in the day, only difference was different fuel source. So we got another can of fuel and checked it and it was clear and we ran it but still smokes and runs poorly. The air filter was off when I shot the video so it louder. The oil bar is at 2 in the cab. Like I said all new filters and oil before starting the day. It will not spool up to full power and blows huge smoke when I try. Suspect a ring but thought would ask those that know more. It had about an hours of run time before this happen with running at fuel power several times. I dread the thought of a rebuild as I have never done one and the cost involved