Story perspectives

Colorado Investigates Diesel-Tainted Gasoline Complaints at Major Retailers

1/10/2026

Summary

Story summary

Colorado state regulators are investigating more than 200 complaints about diesel-tainted gasoline sold at Costco, King Soopers, and Murphy Express.
The contamination occurred on January 7–8 after diesel fuel was mistakenly delivered from an HF Sinclair terminal.
Affected customers reported engine issues after fueling.
King Soopers has identified several impacted locations and halted sales of the contaminated fuel.
Sinclair is conducting an investigation to prevent future occurrences.

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Story summary

Colorado state regulators are investigating more than 200 complaints about diesel-tainted gasoline sold at Costco, King Soopers, and Murphy Express.
The contamination occurred on January 7–8 after diesel fuel was mistakenly delivered from an HF Sinclair terminal.
Affected customers reported engine issues after fueling.
King Soopers has identified several impacted locations and halted sales of the contaminated fuel.
Sinclair is conducting an investigation to prevent future occurrences.