My hat's off to you if you can change out the oil pan gasket yourself. I was told that this is very labor intensive as the subframe have to be dropped, the diff and half-shaft with knuckle have to be removed to say the least. If you're successful at it, would you like to earn some extra cash and do mine?
It's tough to tell the condition of the oil just based on it's color. My oil turned black as little as 1k miles after changing and look at how clean the inside of my engine look