I've noticed that many Sheetz are going to whole milk / french vanilla in the liquid dispensers, displacing the skim milk option. While I know there may not be a large need for skim, I feel like this should be at least a request-able option.
I was told the MTO skim is ordered based on MTO volume and so any self-serve use would through off the numbers. This means Sheetz is the only coffee place around where skim is not an option for self-serve. Submitted for your consideration, a Sheetz Insider.