We have never used the engine oil you mentioned.
The colour of used oil can be deceptive. Black doesn't mean the oil is hopeless although most find that when they stretch their oils to 10K km this is the colour they get.The more important things to figure out will be the operating temperature, smoothness, power, fuel economy, acceleration and ease of starting.
Franklin Reick - lubrications' scientist was the first to liken the engine to a "chemical sewer". There are lots of used chemicals, soot and carbon, acids, contaminants, water, combustion waste etc in there. The used oil has to be quite dark though for some brands of oils they could be a shade darker beacuse of the peculiar additive package and quality of the base oil used.