DPF Guys Blog
INDUSTRY News, Updates, AND Tips from the DPF Guys
The Supreme Court Just Changed Trucking Forever
The Industry Is Talking About Crashes. We Need to Talk About the Smoke.On May 14, 2026, the U.S. Supreme Court ruled 9-0 in Montgomery v. Caribe Transport II, LLC that freight brokers can be held liable for hiring unsafe carriers. Every justice agreed. The U.S....
How Much Pollution Does a Deleted Diesel Truck Produce?
How much pollution does a deleted diesel truck produce? We broke it down using EPA-based data and compared diesel soot to burning tires using real numbers. No hype. No guesswork.What You See vs What’s Actually Happening Most people have seen it. A diesel truck rolls...
AI in Trucking: Why the Industry Needs to Learn From Amazon’s Costly Mistakes Before It’s Too Late
Amazon is one of the most sophisticated technology companies on the planet. It runs warehouses, data centers, and logistics networks at a scale most businesses can't imagine. And in early 2026, it learned a painful lesson about what happens when you hand too much...
Diesel Emissions Myths That Could Cost You Thousands: Setting the Record Straight
Two stories are spreading fast through the diesel truck community right now. You have probably heard at least one of them. Maybe both.The first goes something like this: Trump and the EPA wiped out diesel emissions laws. Deletes are legal now. Do whatever you want....
A Parked Regen Is Not a Fix. It’s Your Truck Asking for Help.
There is a debate that runs on a loop in the diesel truck community. It goes like this: emissions systems are the problem. Road calls are proof. If the technology worked, trucks wouldn't be breaking down every few hundred miles.It is an understandable argument. If you...
The Delete Crowd Won’t Tell You This. Your Wallet Will.
The stories below are composite experiences drawn from real conversations in the diesel industry. Names and details are changed. The mechanical failures and dollar amounts are not.Spend five minutes in any diesel truck forum or Facebook group and you will find them....
The FMCSA Is Eliminating ELD Requirements. Truth or Yet Another Trucker Fantasy?
For a moment, it sounds real. That is the point.Something pops up on Facebook.A loud graphic.ALL CAPS ON A RED BACKGROUND.The claim is simple and explosive. FMCSA is eliminating ELD requirements. Then the echo chamber kicks in. “My neighbor’s friend’s uncle works for...
Before You Change Anything on Your Fleet’s Trucks, Understand What the Latest EPA News from the Wall Street Journal Actually Means for Your Business
Before You Change Anything on Your Fleet’s Trucks Understand What the Latest EPA News from the Wall Street Journal Actually Means for Your Business And what it very clearly does NOT mean Published February 10, 2026Over the past few days, a Wall Street Journal report...
The Hidden Chemistry of Diesel Combustion, From Dodecane to the Tailpipe
How microsecond combustion creates unfinished chemistry and how modern diesel systems finish the job. Most explanations of diesel engines begin and end with the bang. Air goes in. Fuel goes in. Pressure rises. Power comes out. That explanation is not wrong. It is...
A Freight Market Shakeup Is Coming
The trucking industry is entering one of those periods when the surface looks calm but the undercurrents are already moving with force. Spot rates stay flat. Operators leave the market in small numbers. Freight volumes drag through another slow quarter. Enforcement...
Diesel Deletes Are a Ticking Time Bomb: The Truth No One Told You
Diesel emissions systems have been a hot topic for truckers and fleet owners for years. Some see them as an expensive hassle, while others view them as a necessary component of modern diesel engines. The debate has fueled myths and misinformation, leading many...
Broken Cummins or PACCAR DOC Baffle? Fix It, Don’t Replace It!
If you’re a fleet manager or truck owner, you know the pain of dealing with diesel oxidation catalyst (DOC) failures. Whether you’re driving a PACCAR MX-13, MX-11, or a Cummins X15, broken baffles can trigger expensive repairs and extended downtime. But don’t worry—DPF Guys is here to save the day with affordable DOC cleaning and repair services. And with references to PACCAR’s E254 and Cummins’ TSB180046, we’ve got you covered with solutions that save thousands!
Understanding California’s Clean Truck Check — and How Remote Emissions Monitoring Changes Everything
California’s Clean Truck Check (CTC) program represents one of the most important changes in trucking regulations in recent memory. The state is no longer relying on occasional inspections or targeted enforcement to catch high-polluting vehicles. Instead, California...
Cummins X15 Broken DOC Baffle? Symptoms & How DPF Guys Can Fix It Fast!
If you're dealing with fault codes 1664, 1691, 1922, 2692, 3256, 3376, 3396, or 4449 on your Cummins X15 CM2350 X114B or X15 CM2350 X116B, there’s a good chance your DOC baffle is broken—and that means trouble. Regens keep failing, soot builds up, and eventually, your...
The Silent Killer of Diesel Emissions Systems: What They’re Not Telling You About DOC Face Plugging
In the early days of diesel aftertreatment, most drivers thought the diesel particulate filter (DPF) was the problem child. If your rig threw a code, failed to regen, or lost power, it must be the DPF, right? Wrong. Behind the scenes, a more insidious failure has...