Downs Energy at 1950 Railroad Street, Corona, California.

This is a great a rarely busy gas station near the Metrolink West Corona train station. It is easy to get to, but easy to miss driving along Railroad Ave. It has both commercial and public gas meters, but no attendant, so there's no services other than gas and pay toilets/air/water. Personally, I like it a lot. Their prices are usually a few cents higher than Arco or Vons, but less than Shell.