Comment by treetalker
1 day ago
Possible! But I tend to trust Costco when it makes a statement of quality/content because it has actually earned a level of my trust over the years. Misrepresenting something so innocuous (in the big scheme of things) would have far more downside than upside — particularly where Costco provides the tire stations as an additional value / at no additional cost.
There is no "misrepresentation" here by Costco.
Using one of their tire stations does in fact fill your tires with a compressed gas that is mostly nitrogen.
There is a potential "misunderstanding" by those who don't realize that ordinary compressed air is 78% pure nitrogen gas.