As I was doing my daily admiration of my glorious & magnificent stockpile of automotive lubricants, I noticed I have a 5 qt jug of QSUD bottled in Nov-2016. I have other QS oils made around the same time and same container style with QSAD line having black caps, HM line with red caps, and the QSUD line with gold caps. This bottle is labeled as QSUD 5W-30 but it has a sealed black cap. Is this more likely to be a miscapped QSUD oil or a mislabeled QSAD oil? I emailed the batch number and Shell's reply told me to look at the part number printed on the back label - which wouldn't help if it's a mislabeled QSAD product. Or was the container supposed to be like this? Should I worry that it's a returned container?