http://www.countonshell.com
2. Chevron
http://www.chevron.com
3. ExxonMobil
http://www.exxonmobil.com
4. Valero
http://www.valero.com
5. ARCO
http://www.arco.com
6. Texaco
http://www.texaco.com
7. Phillips 66
http://www.phillips66.com
8. 76
http://www.76.com
9. CircleK
http://www.circlek.com
10. Esso
http://www.esso.com