This morning I changed the oil and filter on the Ohan generator. It is a 7 KW. It only holds 2 quarts of oil and when I drained it , there was only about a little over a quart came out and it sure was dirty. theis generator has 63 hours on it and this is the first change. I was really suprised when I fould it only held two quarts of oil. I think this needs to be changed a little more often and also checked more frequently. It was a simple job to change the filter and the oil. LIving in florida the temp. is never below 32 so I installed 30 wt.oil.