Be aware that Sunoco was bought out in the past year, and who knows if their motor oil formulas have changed. As a former PA resident, I know Sunoco had a solid reputation, if only as a regional refiner.
Here is the Danish page for Sunoco. They make good quality products. No reason to have any doubts about their quality.
Thanks had already checked out there website. Ofcourse they do a good job selling there stuff. But also nice to hear real experience from people who had used it.