I have a neighbor that I ride dirt bikes with occasionally he does nothing for his bike I feel so bad for it I offer to change the oil in it from time to time and some basic stuff. A couple years ago we went on a weekend trip and he dumped his bike over in a river submerged the whole thing and rode it the rest of the week not worring about the oil at all . rode the bike like that the rest of the summer that fall I offered to change the oil if he would buy it. Not being familiar with his bike was first time I changed his oil. I pulled the starter off on accident and strait up gray milky sludge came out of there so I put it back on and pulled the filter and drained the oil same thing in the oil gray water came out and all I got was a 1/3 qt out of it. I told him to just get ride of it and not even fire it up. He told me it just makes it stronger.