Back in 2004, several automakers got together to create a more pure form of gasoline to meet strict standards set by the U.S. Environmental Protection Agency (EPA), now known as Top Tier gasoline.

DENVER — Specific gas stations operated by King Soopers, Murphy Express and Costco will need to have their unleaded fuel tanks and pumps cleaned before customers can gas up again. At least a dozen ...

At least 200 complaints have been filed after multiple Colorado gas stations received contaminated fuel. The process to clean out the fuel tanks is expensive. 'Uninvestable': Trump pitch to oil execs ...