Black oil just means the oilis doing it's job. Oil after a change will always change color, and the filter you use will have very little effect. It has nothing to do with with a dirty engine. If you didn't have black oil i would be concerned. You have combustion by product from gasoline burning that cannot be filtered out.
Don't worry about it and change at the specified interval.
The only way you can tell the condition is to go through an oil analysis. Color has no beaing on the conditon of the engine or the oil.
Don't worry about it and change at the specified interval.
The only way you can tell the condition is to go through an oil analysis. Color has no beaing on the conditon of the engine or the oil.