Personally I use Exxon which is close to me and then shell. All premium grade. Have not seen a Chevron station around these parts in a while. With all stations, you can have issues if the fuel tank is running low because the gas coming from the low point can be contaminated. I use a bottle of the Chevron techron every 3K or so. Jus an added insurance to help clean the engine.
2008 650 Convertible- 6 Speed manual- Sport package- HUD- Lane Departure- Comfort Access- Merino Leather- HD Radio- SAT