I just replaced the cap on my air compressor because of an oil leak now I need to find out what kind of Oil was in there so I can replace it. Is there a way to tell a difference between regular oil ...
While I know I lost maybe 2-3 quarts of oil during this leak, when I check the dip stick it's reading full? Am I doing something wrong or how can I get a accurate reading? Is there a difference between hot and cold?