He Went to Prison. His Warning for Diesel Truck Owners.
About this episode
A diesel shop owner recounts how an EPA investigation escalated into a subpoena, years of limbo, and ultimately “I went to federal prison.” He explains how investigators couldn’t separate legitimate work from “deleting,” and describes the personal toll: a “waiting game,” a four-month sentence, fines, and supervised-release limits like “for the first 90 days, you can't leave the state.” The hosts then translate his story into a warning: legality can flip, and “just chip” setups may be enforced later—sometimes requiring a “carb number.”
EPA
"I said, oh, I have some lovely EPA sitting in my driveway"
EPA is the U.S. government agency that sets and enforces pollution rules. For diesel trucks, they can look into whether a truck or business is breaking emissions laws.
EPA stands for the U.S. Environmental Protection Agency. In the context of diesel trucks, the EPA is the regulator that enforces emissions rules (like limits on NOx and particulate matter) and can investigate violations.
subpoena
"tell him to hand you the subpoena and tell him to get off your property."
A subpoena is a court/legal order that forces someone to hand over information or show up. Here, it’s being used as part of a government investigation.
A subpoena is a legal order requiring someone to produce documents or appear in connection with an investigation or court case. In this segment, it’s part of an enforcement process tied to the EPA’s actions.
limbo
"So I kind of just sat and for about two years in limbo"
“In limbo” means things are on hold and nothing is decided yet. He’s saying the situation kept him from moving forward for a long time.
“In limbo” means being stuck in an unresolved situation with no clear outcome or next steps. In the story, it describes how the investigation stalled the business for an extended period.
diesel business
"I just quit doing everything by diesel business"
“Diesel business” here refers to a commercial operation centered on diesel trucks—likely related to servicing, parts, or compliance work. The key point is that the legal pressure disrupted his ability to keep operating in that diesel-focused niche.
semis
"when bots and semis started doing oversize, you know, trucking"
“Semis” is shorthand for semi-trucks (tractor-trailers) used in long-haul freight. They’re a major segment for diesel emissions regulation and enforcement because of their high mileage and heavy-duty engines.
oversize trucking
"when bots and semis started doing oversize, you know, trucking"
Oversize trucking refers to hauling loads that exceed standard size/weight limits, which typically triggers special permitting and routing rules. For diesel fleets, that can change operating patterns and compliance requirements.
diesel fuel
"[1229.5s] Hey, Diesel fans, I wanted to chat with you [1231.1s] about Diesel Fuel. [1232.2s] It's something we've talked about a lot on the podcast [1234.7s] and specifically ways that it can lead [1237.3s] to a lot of costly repairs."
Diesel fuel is what powers diesel engines. The type/quality of the fuel can affect how hard the engine’s fuel parts have to work and how quickly they wear out.
Diesel fuel is the fuel used in diesel engines, and its chemistry affects how well the fuel protects the engine’s fuel system. In trucks, the fuel’s properties can influence injector wear and how smoothly the engine runs.
lack of lubricity
"[1239.4s] And the main reason that we have these issues [1241.4s] is a lack of lubricity. [1243.1s] Our friends over at Hot Shots Secrets [1244.4s] have developed a formula that boosts performance"
Lubricity is how well diesel fuel “lubricates” the engine’s fuel parts. If the fuel doesn’t lubricate well, those parts can wear out faster and cause expensive problems.
Lubricity is how well diesel fuel lubricates the precision components in the fuel system, especially the high-pressure parts that operate under extreme loads. When fuel has low lubricity, it can increase wear on components like injectors, leading to costly repairs.
Hot Shot's Secret
"[1241.4s] is a lack of lubricity. [1243.1s] Our friends over at Hot Shots Secrets [1244.4s] have developed a formula that boosts performance"
Hot Shots Secrets is a company that sells aftermarket products like fuel additives. Here, they’re being credited with a diesel additive meant to help protect the fuel system.
Hot Shots Secrets is an aftermarket brand/company that makes fuel additives and other products aimed at improving engine performance and protecting components. In this segment, they’re presented as developing a diesel additive to improve fuel lubricity and injector cleanliness.
hot shots edt
"[1255.0s] Hot Shots EDT is a six-in-one formula [1257.9s] and it cleans injectors, boosts C-tane, [1260.6s] and it has four times the lubricity [1262.7s] as our leading competitor."
Hot Shots EDT is a specific additive you put into diesel fuel. The claim is that it helps keep the fuel system clean and improves how well the fuel protects the engine.
Hot Shots EDT is a specific diesel fuel additive product marketed to improve fuel system behavior. The host claims it cleans injectors, boosts cetane, and increases lubricity compared with a leading competitor.
six-in-one formula
"[1255.0s] Hot Shots EDT is a six-in-one formula [1257.9s] and it cleans injectors, boosts C-tane, [1260.6s] and it has four times the lubricity"
“Six-in-one formula” means the additive is supposed to do several jobs at once. Here, they say it cleans injectors and improves fuel properties like lubricity and cetane.
A “six-in-one formula” is marketing language meaning the additive is designed to combine multiple functions in one product. In this segment, those functions are described as cleaning injectors, boosting cetane, and improving lubricity.
C-tane
"[1255.0s] Hot Shots EDT is a six-in-one formula [1257.9s] and it cleans injectors, boosts C-tane, [1260.6s] and it has four times the lubricity"
C-tane refers to cetane, which is a measure of how easily diesel fuel lights off in the engine. Better cetane can mean easier starts and smoother running.
“C-tane” is the host’s shorthand for cetane, a measure of how readily diesel fuel ignites under compression. Higher cetane generally helps diesel engines start more easily and burn more smoothly, especially under load or in colder conditions.
injectors
"[1255.0s] Hot Shots EDT is a six-in-one formula [1257.9s] and it cleans injectors, boosts C-tane, [1260.6s] and it has four times the lubricity"
Injectors are the parts that spray diesel fuel into the engine. If they get dirty or wear out, the engine can run worse and repairs can get expensive.
Diesel injectors are the high-precision components that spray fuel into the engine’s combustion chambers. If injectors get dirty or if fuel has poor lubricity, they can wear or spray unevenly, contributing to drivability issues and repair costs.
chip
"they can come back five years, [1815.3s] and get you for the stuff you thought was okay to do, [1818.2s] you know, just chip, it's kind of my message,"
A “chip” here means a device or software change that makes the diesel engine run differently. Some chips can change fueling in a way that may increase pollution, which is why they can get you in trouble.
In diesel truck talk, a “chip” usually means an aftermarket engine tuning module or reflash that changes how the engine runs (fueling and boost behavior). The concern is that tuning can increase emissions or bypass emissions-related controls, which is why enforcement can target it.
Clean Air Act
"we're not necessarily constitutional scholars, [1840.7s] or experts on the political process, [1842.8s] or the Clean Air Act, or any of that stuff."
The Clean Air Act is a U.S. law that sets rules for limiting air pollution. If you modify a diesel truck, those rules can determine what’s allowed and what could lead to fines or enforcement.
The Clean Air Act is a major U.S. federal law that regulates air pollution. For diesel owners, it matters because emissions rules can affect whether modifications (like engine tuning) are legal and whether they must be tested or certified to avoid increasing pollution.
parts would have to be tested
"like i said from just covering this over the years, [1856.9s] it'd be fines or parts would have to be tested first, [1859.5s] or they'd need a carb number,"
The speaker is saying some aftermarket parts may need emissions testing before they’re considered acceptable. The goal is to prove the change doesn’t make pollution worse.
This refers to emissions-related certification/testing requirements for aftermarket parts. The idea is that if a modification could affect emissions, regulators may require testing to prove it doesn’t increase pollution.
fines
"it seemed like it did, [1853.0s] like i said from just covering this over the years, [1856.9s] it'd be fines or parts would have to be tested first,"
Here, “fines” means money penalties the government can charge if a diesel modification violates emissions rules. The warning is that enforcement can come years later.
In this context, “fines” refers to monetary penalties imposed for violating emissions or vehicle-modification regulations. The speaker’s point is that enforcement can happen later, even if something was legal at the time.
emissions
"or they'd need a carb number, [1861.1s] or go through different entities [1863.0s] to prove it didn't increase emissions, [1865.5s] and like that was a conversation,"
“Emissions” means the pollution coming out of the truck’s exhaust. The concern is whether a modification makes that pollution worse.
“Emissions” here means the pollutants a diesel engine produces, especially exhaust gases and particulate matter. The whole warning is about whether modifications increase emissions and therefore trigger regulatory enforcement.
CARB number
"it'd be fines or parts would have to be tested first, [1859.5s] or they'd need a carb number, [1861.1s] or go through different entities"
A “CARB number” is an approval code from California that shows an emissions-related modification is allowed. Diesel owners use it to check whether a part or tune is compliant with pollution rules.
A “CARB number” refers to an approval identifier from California’s Air Resources Board (CARB) for emissions-related compliance. Diesel owners often look for CARB Executive Order (EO) numbers to confirm an aftermarket part or tuning is legally compliant for emissions purposes.
AG side
"pickup trucks, and you had mentioned tractors and things like that, like the AG side of it, and I'm just curious, like, to the people who have those types of vehicles or equipment"
“AG side” refers to the agricultural use case—farm equipment and work vehicles used for livelihood rather than commuting. The key idea is that diesel emissions/aftertreatment problems hit harder when the vehicle is needed in remote locations and downtime directly affects work.
power stroke
"they face a lot of the same issues that, people with a power stroke or Duramax or Cummins do with these systems and how they operate."
“Power Stroke” is Ford’s line of diesel engines. It’s the engine in a lot of Ford diesel trucks, and when owners talk about problems, they’re often talking about how the truck’s emissions system runs and cleans itself.
“Power Stroke” is Ford’s diesel engine family used in many of its Super Duty pickup trucks. When people mention it in a reliability context, they’re usually talking about how the engine’s emissions equipment and diesel controls behave under load and during regeneration.
Duramax
"people with a power stroke or Duramax or Cummins do with these systems and how they operate."
Duramax is GM’s diesel engine used in some Chevy and GMC trucks. People bring it up because the diesel emissions system and how it cleans itself can affect reliability and downtime.
Duramax is General Motors’ diesel engine brand used in Chevrolet and GMC trucks. In diesel-owner discussions, “Duramax” typically refers to the engine plus its emissions-control strategy, which can include aftertreatment behavior and regeneration cycles.
Cummins
"people with a power stroke or Duramax or Cummins do with these systems and how they operate."
Cummins makes diesel engines used in some Ram trucks. When owners talk about Cummins problems, they’re usually talking about how the emissions system and diesel controls work in real life.
Cummins is a diesel engine brand (and manufacturer) widely used in Dodge/Ram trucks. Like other diesel brands mentioned here, the key point is that the engine’s emissions systems and control logic can create similar failure or inconvenience modes for owners.
after treatment system
"Decelentions and decelentions, the after payment system, it's a failed system, like it's all the same, it's just, you know, when your pickup goes down, it's inconvenient and it sucks"
They’re talking about the truck’s emissions-cleaning system that works after the exhaust leaves the engine. If that system has a problem, the truck can act up or limit power, which is especially painful when you rely on the truck for work.
The speaker is referring to a diesel “aftertreatment” system—emissions hardware that cleans exhaust after it leaves the engine. In many modern diesels, this includes components that can trigger regeneration or other control strategies, and failures can cause derates or inconvenient downtime.
decelentions
"Decelentions and decelentions, the after payment system, it's a failed system, like it's all the same, it's just, you know, when your pickup goes down"
This sounds like they mean “decelerations,” basically slowing down. On a diesel truck, slowing down can change exhaust conditions, which can affect how the emissions system responds.
“Decelentions” appears to be a mis-transcription of “decelerations,” i.e., what happens when you slow down. In diesel emissions discussions, slowing down can coincide with exhaust conditions that influence how the aftertreatment system behaves (for example, whether it needs to clean itself).
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