| Shell BP Sunoco Speedway Circle K Chevron Maverik Phillips 66 QuikTrip ExxonMobil | no no yes yes yes no yes no yes no |
The 10 most popular gas station chains were contacted and asked if they sold stamps, and the findings are as follows. Stamps: Sunoco, Speedway, Circle K, Maverik, and QuikTrip are the primary stations that might have stamps.