EPA
27
Everything you need to know about the changes coming to diesel trucks due to the new regulations.
News. Reviews. Engineer Explains. Reliability.
Emissions Changes / EPA 27
Understand EPA 2027 emissions requirements before sorting through the engine announcements. Start with the basics, then explore PUTT’s reporting on hardware, oil, maintenance and the questions still unanswered.
START HERE: EPA 27 EXPLAINED
What changes, which trucks it affects, and why owners should care about cost, reliability and maintenance.
EPA 27 explained: What truck owners need to know
The cornerstone guide separates commercial-engine rules from pickup requirements, explains DEF and warranties, and distinguishes final rules from proposals.
ENGINEERING AND REAL-WORLD OWNERSHIP
See how manufacturers approach the emissions challenge. Commercial-truck hardware and pickup hardware are not automatically interchangeable.
GM’s 8.3L Duramax
An announced pickup engine, explained with GM’s engineers.
Two DEF injectors
A closer look at GM’s exhaust-treatment hardware.
Daimler’s emissions engineer explains
Aaron Turpen interviews Daimler’s Dan Potter about commercial engines and emissions requirements.
OIL, ENGINE PROTECTION AND EMISSIONS
Lubricant development is part of the durability story. A new oil category does not override an engine’s required viscosity, approval or service interval.
CONFIRMED NEWS AND WHAT COMES NEXT
An announced engine, an oil-test result and an editorial prediction carry different levels of evidence.
A test engine or proposed oil specification does not confirm a new production pickup engine. Look for a manufacturer announcement naming the engine, application and timing before treating a forecast as fact.