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Internal Combustion Engines
Josh Fisher | FleetOwner
The open hood and engine compartment of a Fifth Generation Freightliner Cascadia revealing the heavy-duty Detroit Gen 6 diesel engine.
Emissions & Efficiency
EPA 2027 explained: What unresolved regulations and NCPs mean for future truck orders
From vacated CO2 rules to the battle over warranty mandates and non-conformance penalties, here’s what fleet leaders need to know before spec’ing 2027 trucks.
Sept. 30, 2026
ID 284300364 © Rik Trottier | Dreamstime.com
tailpipe emissions
Pickups & Vans
From ‘America First’ to ‘America: dead last’
Sept. 10, 2026
Florin Seitan | Dreamstime.com
DEF systems are essential to the selective catalytic reduction (SCR) process in diesel vehicles, which uses chemical reactions to neutralize NOx emissions.
IdeaXchange
Why DEF sensors are essential to American trucking
July 30, 2026
Google Gemini
A Kenworth DEF derate warning message that ironically states 'DEF derate in: NEVER'
Emissions & Efficiency
EPA finally unveils relaxed NOx rule—and plans to remove DEF derates
July 9, 2026
Volvo Trucks North America
VTNA new D13 engine design
Equipment
How Volvo's next D13 engine balances EPA27 with efficiency
The Fleet Lead
June 10, 2026
Daimler Truck North America
A technician conducts testing on a Detroit diesel engine at Daimler Trucks' Detroit Manufacturing Plant.
Lane Shift Ahead
Diesel still drives trucking's future beyond 2027
March 2, 2026
Josh Fisher | FleetOwner
DTNA Head of Powertrain Engineering Greg Braziunas presents the technical specs and fuel efficiency gains of the new Detroit Gen 6 heavy-duty engines for EPA 2027 compliance.
Equipment
First look: DTNA’s Detroit Gen 6 engines tackle EPA 2027 with focus on fleet fuel savings
Feb. 19, 2026
International Motors
redesigned LT with S13 integrated powertrain
Equipment
International confirms S13 powertrain is ‘EPA27 ready,’ offering fleets consistency and efficiency
Jan. 8, 2026
ID 26326635 © Saltcityphotography | Dreamstime.com
diesel exhaust fluid
News
Trump EPA weakens DEF derates
Aug. 15, 2025
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