I know nothing above pressure washers. I purchased a 6.5 hp with 3600 rpm with 2800 psi and 3gpm. I get it home and it appears their isn't oil in the washer. Question, how much di I put into the washer. Their are also two areas where oil goes, the dip stick on the side and a oil pump stick on top. I called Harbor Freight and of course thhey have no anwers to my questions. Can ayone help me please?