More than 400 consumers have filed complaints with the Division of Oil and Public Safety (OPS) after a contaminated fuel mix was distributed to several gas stations across the Denver metro area last week.

Consumers quickly turned to social media and OPS for answers upon learning that diesel fuel was mixed with regular unleaded gasoline and distributed to gas stations operated by Costco, Murphy Express, and King Soopers. At least 13 King Soopers gas stations were affected.

State officials reported that the contaminated fuel originated from the HF Sinclair terminal in Henderson and was sent out to “numerous” gas stations. The fuel was distributed between 2 p.m. Wednesday and 6 a.m. Thursday.

“OPS continues to log and process these complaints,” the Colorado Department of Labor and Employment wrote in an email to The Post on Monday evening. “Inspections and fuel sample testing remain ongoing with a focus on smaller locations that may not have as robust of a claims filing process. All retailers are being encouraged to honor customer claims.”

OPS has also requested that Sinclair produce a list of retailers that received the contaminated fuel from the HF Sinclair terminal in Henderson. Although Sinclair has not yet provided the list, OPS is hopeful it will be released in the coming days.

Consumers impacted by the contaminated fuel are encouraged to contact their point of sale to start the reimbursement process. Individual gas stations will work with each customer through their specific claims procedure. Those affected should keep all receipts and repair records for reference.

To file a complaint, consumers can call 303-866-4967 or fill out a consumer complaint form and email it to cdle_oil_inspection@state.co.us. King Soopers customers who believe they received contaminated fuel should reach out to their local store for assistance.

“OPS continues to investigate the cause of the incident and is considering appropriate enforcement mechanisms available under current OPS rules and regulations,” the Colorado Department of Labor and Employment added in their statement. “OPS remains committed to protecting consumers and is exploring all options to ensure Sinclair also upholds its commitment to help affected customers.”

This is a developing story and may be updated.
https://www.denverpost.com/2026/01/12/denver-contaminated-gas-stations-complaints/