Plain-spoken articles on diesel maintenance, repair and ownership.
DEF fluid runs about $3 to $4 a gallon in jugs, or less than half that in bulk at truck stops. This guide breaks down pump prices, bulk tank costs, and how to avoid overpaying for diesel exhaust fluid in 2026.
Regen meaning, in plain terms: it's how a diesel truck burns off soot trapped in its DPF. This guide breaks down passive, active and forced regens, what triggers each one, how long they take, and what to do when a regen fails or won't complete.
DPF filter cleaning cost runs about $300 to $900 depending on method, while full replacement can hit $2,000 to $4,000+. Here's what drives the price, when cleaning beats replacement, and how to avoid a bigger bill down the road.
DEF isn't disappearing — EPA's tighter NOx rules actually lock SCR and DEF systems in for years to come. Here's what's changing, what isn't, and how it affects your truck, RV, or fleet.
An EGR valve change runs about $250-$900 for parts and labor, though cleaning a stuck valve can cost far less. Here's how to tell if you need cleaning or full replacement, what a shop does during service, and why deleting an EGR valve is illegal under the Clean Air Act.
A DPF filter traps soot from diesel exhaust and burns it off through regeneration. Learn how the system works, warning signs of a clog, service intervals, and real 2026 cleaning and replacement costs.
Oil, fuel filters, coolant, glow plugs — keeping a diesel healthy between shop visits
Injectors, turbos, fuel systems and what those trouble codes actually mean
DPF regens, DEF, EGR and SCR — how the emissions system works and fails
PM schedules, DOT inspections and keeping work trucks on the road
Motorhomes, tractors and farm diesel — service that comes to the field
Power Stroke vs Cummins vs Duramax, used-truck checks and ownership costs
What common diesel repairs cost and how to compare quotes
Emissions testing, delete laws and inspection rules by state
