The Non-Financial Ledger

Picture a Tuesday morning in Castle Rock, Colorado. It is cold. January cold. You wake up, you have somewhere to be, and you go out to your driveway and turn the key. The engine strains. Something sounds wrong, a wet chugging sound where there should be a clean ignition. You try again. Nothing.

This is how it started for Lindsey DeHart. She had stopped at the King Soopers fuel station on North Ridge Road the morning before, at 7:15 in the morning, before the sun was fully up. She put 14.81 gallons of what the pump told her was unleaded plus gasoline into her 2024 Subaru Outback. She paid $36.72. She drove home without incident.

The next morning her car would not start. She did not know it yet, but HF Sinclair Corporation had loaded diesel fuel into transport trucks at its terminal in Henderson, Colorado the previous afternoon. Those trucks had driven up and down the Front Range through the night. The contaminated fuel had been pumped into underground storage tanks at King Soopers stations, at Costcos, at Circle Ks, at Safeways, at Sinclair-branded stations and Murphy Express locations. Lindsey’s car was sitting in a driveway in Castle Rock with diesel in its fuel system.

She called a tow truck. The car was taken to the Subaru dealership at 9955 East Arapahoe Road in Centennial. That was January 9th. She did not get a confirmation of what had happened until January 26th, when a sample test came back confirming diesel contamination. That is 17 days of not knowing for certain, 17 days of waiting, 17 days of paying for a rental car she had not budgeted for, 17 days of logistics that cost time and money and energy she did not plan to spend.

Her story is the face on a number that the complaint says runs into the thousands. There were hundreds of drivers across Colorado on January 8th and 9th who experienced the same confusion: car runs fine, then begins to sputter, hesitate, lose power. Then it stalls. Then it will not restart. Many were towed from wherever they happened to be when the fuel system gave out. Some had nearly empty tanks when they filled up, meaning the diesel-to-gasoline ratio in their fuel system was highest, meaning the damage was worst. Fuel injectors coated with a substance they were never engineered to handle. Spark plugs fouled. Fuel pumps strained. Catalytic converters stressed.

There is no drama in a gas pump. You pull up, you slide your card, you fill your tank. You trust that the thing dispensed to you is what the label says it is. That trust is so complete and so ordinary that it does not even feel like trust. It just feels like Tuesday. King Soopers and HF Sinclair collected that trust and the $36.72 that went with it, and they did not do the minimum required to deserve either.

The Facts: How 400,000 Gallons of Diesel Reached Your Tank

The contamination event has a clear, documented sequence. Here is what the complaint and state records show about how it unfolded.

• Afternoon of January 7, 2026: Diesel-contaminated fuel is loaded from HF Sinclair Corporation’s third-party supplier terminal in Henderson, Colorado into transport vehicles. The contamination originates at this single facility and moves outward from there.
• January 7 afternoon through January 8 morning: Transport vehicles deliver contaminated fuel to retailers across the Colorado Front Range. The fuel is dispensed into underground tanks labeled for regular unleaded and plus grade gasoline at locations operated by King Soopers, Costco, Circle K, Safeway, Sinclair-branded stations, and Murphy Express.
• 7:15 a.m., January 8, 2026: Plaintiff Lindsey DeHart purchases 14.81 gallons at the King Soopers station at 750 N. Ridge Road, Castle Rock, Colorado. She drives home without immediate symptoms.
• Morning of January 8, 2026: Consumer complaints begin reaching the Colorado Division of Oil and Public Safety. Drivers report engines sputtering, hesitating, misfiring, or stalling shortly after fueling.
• 10:00 a.m., January 8, 2026: A Division inspector visits a Costco in Sheridan, Colorado and confirms diesel contamination in the regular unleaded tank through visual inspection alone. Diesel is visually distinct from gasoline. Additional confirmation follows at a Costco in Superior, Colorado the same morning. Industry partners acknowledge awareness of the contamination event.
• January 9, 2026, morning: Lindsey DeHart attempts to start her vehicle. The engine struggles and makes chugging sounds. She calls a tow truck. The vehicle is taken to the Subaru dealership in Centennial, where it remains for nearly three weeks.
• By midday, January 9, 2026: The Division has already received over 200 separate complaints from drivers across Colorado. Many affected vehicles required towing because they became unsafe or inoperable on the road.
• January 10 through January 11, 2026: The Division contacts approximately 3,000 gas station owners across Colorado to notify them of the contamination event and the associated risks.
• January 14, 2026: HF Sinclair provides state regulators with a list of 46 gas stations across 11 Colorado counties that received contaminated fuel from the Henderson terminal.
• By January 15, 2026: The Division has received more than 600 formal complaints. New claims continue to arrive.
• January 26, 2026: Laboratory sample testing confirms diesel contamination in Lindsey DeHart’s fuel tank at the Subaru dealership. This is 18 days after she fueled up.
• January 27, 2026: Class action complaint filed in the U.S. District Court for the District of Colorado, Civil Action No. 1:26-cv-00330.

“Individual consumers lack the ability to detect fuel contamination at the point of sale.”

Legal Receipts: What the Complaint Actually Says

The following are direct, verbatim statements from the class action complaint filed January 27, 2026. These are not paraphrases. Each block is followed by a breakdown of what it proves.

“Petroleum marketers estimate that at least 400,000 gallons of fuel may have been affected.”

— Complaint ¶ 3, Civil Action No. 1:26-cv-00330

“Gas-powered vehicles are not designed to operate using diesel fuel or fuel contaminated with diesel. Even small amounts of diesel mixed into unleaded gasoline can cause immediate drivability issues, injector fouling, fuel system damage, and catastrophic engine failure.”

— Complaint ¶ 8, Civil Action No. 1:26-cv-00330

“Defendants negligently and recklessly allowed diesel fuel to be distributed to retailers and/or introduced into tanks designated for unleaded regular and plus grade gasoline. Defendants failed to detect the contamination before distributing the fuel to retailers and/or selling the fuel to consumers. Defendants failed to timely shut down affected pumps or warn consumers of the contamination.”

— Complaint ¶¶ 38–40, Civil Action No. 1:26-cv-00330

“Defendants’ violations were willful, entitling Plaintiff and Class members to treble damages under C.R.S. § 6-1-113(2)(a).”

— Complaint ¶ 79, Civil Action No. 1:26-cv-00330

“Without a class action, Defendants will retain the benefit of their wrongdoing, which will result in further damages to Plaintiff and the Class.”

— Complaint ¶ 53, Civil Action No. 1:26-cv-00330

“For Defendants to retain the benefit of the payments under these circumstances is inequitable.”

What You Were Told vs. What Was In Your Tank

Every pump involved in this event displayed the same standard information. Here is what the labeling and implied warranty of the transaction promised, versus what the complaint documents was actually delivered.

Societal Impact Mapping

Public Health and Safety

Diesel contamination does not just damage engines. It creates active public safety hazards on roads and highways.

• Vehicles that experience loss of power, sputtering, hesitation, or stalling on Colorado highways represent an immediate collision risk. An engine misfire at highway speed is not a minor inconvenience; it is a road hazard for the driver and every vehicle around them.
• Many affected drivers reported their vehicles became “unsafe or inoperable” while in motion. The complaint confirms multiple vehicles required towing from wherever they stalled, including roadways, meaning drivers were stranded in potentially dangerous positions.
• The contamination event struck during winter in Colorado, January 8 and 9, when roadside breakdowns carry elevated hypothermia and accident risk. Drivers stranded on the Front Range at below-freezing temperatures face hazards beyond the mechanical damage to their vehicles.
• Individual consumers have no ability to detect fuel contamination at the point of sale. Diesel is visually distinguishable from gasoline by color and odor, but only when examined directly. In an underground storage tank feeding a standard pump, a consumer has zero practical means of inspection before the fuel enters their vehicle.
• The contamination event affected at least 46 stations across 11 counties simultaneously. This is systemic infrastructure failure, not an isolated incident, and it demonstrates the scale of harm that is possible when a single distribution terminal fails without adequate quality control.

Economic Inequality

The economic damage from this event did not fall evenly. It concentrated its worst effects on the people least able to absorb them.

• The complaint notes that “for many of the members of the Class, while substantial, [the amounts at stake] are not great enough to enable them to maintain separate suits against Defendants.” This is a direct admission that individual victims are structurally prevented from seeking justice on their own. The system is designed in a way that makes corporate accountability contingent on a class action.
• Repair costs for diesel contamination range from several hundred dollars for a basic tank drain and flush, up to several thousand dollars for injector service, spark plug replacement, fuel pump replacement, or full engine replacement. For a driver living paycheck to paycheck, even the low end of that range is a financial emergency.
• Loss of vehicle use translates directly into lost wages for anyone whose job requires driving, including delivery workers, rideshare drivers, tradespeople, and anyone without reliable alternative transportation. The complaint explicitly names lost wages as a recoverable category of damage.
• Rental car costs accrue daily for as long as the vehicle is in the shop. Lindsey DeHart was forced to obtain a rental on January 10th. Her car was still at the dealership when the lawsuit was filed on January 27th, meaning at minimum 17 days of rental costs on top of whatever the repair bill totals.
• Towing charges, diagnostic fees, and the time required to manage the repair process all represent costs that fall entirely on the consumer, not the companies whose supply chain failure caused them. Without a class action, King Soopers and HF Sinclair keep the revenue from the contaminated fuel sales while consumers absorb the downstream financial destruction.
• Diminution of vehicle value is an additional harm that persists beyond repairs. A vehicle with a documented history of diesel contamination and associated engine work is worth less on resale, regardless of how thoroughly it was repaired. This loss is permanent and invisible in the transaction record until the owner tries to sell.

The “Cost of a Life” Metric

What Now?

The class action is in its early stages, but the accountability structure and the regulatory bodies involved are already in motion. Here is where to direct your attention.

Who Is Named and Who Bears Responsibility

• HF Sinclair Corporation, a Delaware corporation, operated the Henderson, Colorado terminal where the contamination originated. The complaint identifies the company as the source distributor and names it as a defendant on all five counts.
• Dillon Companies, LLC d/b/a King Soopers Fuel Center, King Soopers, Inc., King Soopers, and City Market, a Kansas limited liability company, principal address 65 Tejon Street, Denver, CO 80223, operated the fuel stations where contaminated product was sold to consumers and is named as a defendant on all five counts.
• The complaint anticipates amendment to add Circle K Stores, Inc.; Safeway, Inc.; Costco Wholesale Corporation; and Murphy Oil USA, Inc. d/b/a Murphy Express as additional defendants as discovery proceeds.
• Class counsel is Berger Montague PC, with lead attorney Alexandra K. Piazza. Contact information for class counsel is in the court record at Civil Action No. 1:26-cv-00330, U.S. District Court for the District of Colorado.

Regulatory Watchlist

• Colorado Division of Oil and Public Safety (OPS): The primary state regulator investigating the contamination event. The Division confirmed contamination, contacted approximately 3,000 gas station owners, and is still processing complaints. File a complaint at ops.colorado.gov if you purchased fuel at an affected station and experienced vehicle damage.
• Colorado Attorney General’s Office: The Colorado Consumer Protection Act violations alleged in the complaint (C.R.S. § 6-1-101 et seq.) fall within the AG’s enforcement jurisdiction. The AG’s office can pursue civil enforcement independent of the class action.
• Federal Trade Commission (FTC): The deceptive trade practice claims parallel FTC jurisdiction over unfair or deceptive acts and practices in commerce. The FTC accepts consumer complaints at reportfraud.ftc.gov.
• U.S. District Court for the District of Colorado: The class action is active at Civil Action No. 1:26-cv-00330. Court filings are public record and available through PACER. Affected consumers can monitor class certification proceedings and potentially opt in or out of the class as the case develops.
• Environmental Protection Agency (EPA): Fuel quality standards, including contamination disclosure requirements for fuel distributors, fall under EPA jurisdiction at the federal level. The EPA’s enforcement division can be contacted if evidence of ongoing violations emerges.

Mutual Aid and Grassroots Resistance

• Document everything right now. If your vehicle was affected, save every receipt: the fuel purchase, towing, diagnostics, rental car, repair estimates, and repair invoices. Save them digitally and physically. These records are the factual basis of your claim.
• File a complaint with the Colorado Division of Oil and Public Safety at ops.colorado.gov. Every formal complaint strengthens the state’s case and creates a public record that cannot be quietly settled away.
• Contact Berger Montague PC directly if you purchased fuel at any of the 46 identified stations during January 7–8, 2026, and experienced vehicle problems. The class action was filed on your behalf, but your individual documentation strengthens the collective case and may affect your personal recovery.
• Share this case in your community, specifically in mechanic shops, neighborhood apps, and community boards. There are people whose cars were damaged by this event who do not know there is active litigation. Mechanics who handled these repairs in January 2026 are potential witnesses. Sharing this information connects affected people to accountability.
• Demand public accountability at King Soopers and HF Sinclair corporate locations. These companies operate hundreds of fuel stations in Colorado. Organized, coordinated, and peaceful consumer pressure at the corporate level is a legitimate tool when the legal process moves slowly.
• Support mutual aid networks for people who cannot afford the gap costs: towing, rentals, and repairs while waiting for any legal recovery. The people most damaged by this event are the ones who cannot absorb even a week of rental car costs. Community-organized support funds and labor co-ops that offer assistance with vehicle repairs are directly relevant here.

“Defendants’ practices have the potential to recur absent judicial intervention.”