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2015 Kenworth T600 Overview, Reviews, Ratings & Specs

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Simon A | December 17, 2025
The 2015 Kenworth T600, often recognized by its distinctive aerodynamic ‘wakes’, is a Class 8 heavy-duty truck. While specific trim levels for the 2015 model year are less defined than in some passenger vehicles, its popularity stems from its reputation for fuel efficiency, driver comfort, and robust performance. It consistently stood out in the trucking industry for its innovative design aimed at reducing drag and improving mileage, making it a favored choice for owner-operators and fleets alike. Pricing for a used 2015 Kenworth T600 can vary significantly based on condition, mileage, and specifications, typically ranging from $40,000 to $90,000+.
The Good

The 2015 Kenworth T600 excels in fuel efficiency thanks to its aerodynamic design, appealing to the practical buyer's bottom line. Its legendary reliability ensures consistent performance, while the spacious and comfortable cab offers a home away from home for drivers, tapping into emotional satisfaction and reducing fatigue on long hauls. This blend of efficiency, durability, and driver-centric features provides exceptional long-term value.

The Bad

Potential owners of the 2015 Kenworth T600 should be aware of possible issues with aging electrical components and complex emissions systems, which can lead to costly repairs. The distinctive aerodynamic design, while beneficial for efficiency, can sometimes make certain maintenance tasks more intricate. Also, ensure thorough inspection of the transmission and drivetrain for signs of heavy use.

2015 Kenworth T600: Quick Overview

  • Engine Options: The 2015 Kenworth T600 typically featured powerful PACCAR MX-13 engines, or Cummins ISX15 engines. These are well-regarded for their torque and durability in heavy-duty applications. Engine configurations varied to suit different hauling needs.
  • Horsepower: Horsepower ratings commonly ranged from approximately 400 hp to over 550 hp, depending on the specific engine and configuration chosen by the original owner. Higher horsepower options were generally selected for heavy-haul or mountainous terrain operations.
  • Fuel Economy: Exact MPG figures are highly variable based on load, terrain, driving habits, and specific engine/transmission configurations. However, the T600's aerodynamic design was a key selling point, aiming for class-leading fuel efficiency that could range from 5.5 to 7.5 MPG under optimal conditions.
  • 0-60 Times: 0-60 mph times are not a standard metric for Class 8 trucks and are heavily dependent on Gross Vehicle Weight Rating (GVWR), load, and gear ratio. These vehicles are designed for sustained speed rather than rapid acceleration.
  • Towing Capacity: The towing capacity is defined by the truck's Gross Combination Weight Rating (GCWR), which can exceed 80,000 lbs for standard applications, and can be configured for much higher ratings (e.g., 100,000+ lbs) for specialized heavy-haul operations. This is determined by the chassis, axles, and driveline specifications.
  • Trim-Level Features: While Kenworth doesn't offer traditional passenger-car trim levels, configurations and options are extensive. Key features often included: aerodynamic fairings and chassis skirts, enhanced cab insulation for noise and temperature control, comfortable sleeper options (e.g., 72-inch raised roof or flat-top sleepers with amenities), advanced climate control systems, premium driver seats, integrated navigation, and available advanced telematics systems for fleet management. Customizable interiors and exterior options allowed owners to tailor the truck to their specific needs and preferences.

2015 Kenworth T600 Specifications

Vehicle Information
Year 2015
Make Kenworth
Model T600
Trim -
Style -
Type Truck
Category Heavy Truck
Manufacturing Details
Made In Mexico
Manufacturing City MEXICALI
Dimensions
Doors -
Curb Weight -
Gross Vehicle Weight Rating -
Overall Height -
Overall Length -
Overall Width -
Wheelbase Length -
Standard Seating -
Engine & Performance
Engine 14.9L L6 DIESEL
Engine Size 14.9L
Engine Cylinders 6
Transmission -
Transmission Type -
Transmission Speeds -
Drivetrain 6x4
Additional Features
Anti-Brake System -
Steering Type -
Pricing
Manufacturer Suggested Retail Price (MSRP) -
Invoice Price -
Delivery Charges -

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What Problems Does the 2015 Kenworth T600 Have?

While the 2015 Kenworth T600 is generally praised for its robustness, like any heavy-duty truck, it can develop issues over time and with mileage. Some frequently reported concerns, though not necessarily specific to the 2015 model year but applicable to trucks of this era, can include electrical gremlins. This might manifest as intermittent dashboard warning lights, issues with sensors, or problems with accessory controls. The complexity of modern emissions systems, such as Diesel Particulate Filters (DPFs) and Selective Catalytic Reduction (SCR) systems, can also be a source of maintenance headaches and costly repairs if not properly maintained or if components fail. Issues with the exhaust gas recirculation (EGR) system are also not uncommon in trucks of this vintage. Some owners have reported premature wear on certain suspension components or issues with air-ride systems if not regularly inspected and maintained. Regarding recalls, specific to the 2015 model year, owners should always consult the NHTSA (National Highway Traffic Safety Administration) website using the VIN for the most accurate and up-to-date recall information, as these can be issued for various components, from braking systems to safety restraints. Long-term reliability hinges heavily on the maintenance regimen followed. Trucks that have been meticulously serviced according to manufacturer recommendations, with regular fluid changes, filter replacements, and proactive inspections, tend to exhibit far fewer significant problems than those with neglected maintenance. The PACCAR and Cummins engines are known for their durability, but even these require consistent care to prevent issues related to oil contamination, cooling system failures, or turbocharger problems, especially under demanding operating conditions.

How long will the 2015 Kenworth T600 last?

A 2015 Kenworth T600, when properly maintained, can realistically achieve 1 million to 1.5 million miles or more in its service life. Owner data and typical maintenance habits show that trucks used for long-haul operations, averaging 100,000 to 150,000 miles per year, can remain productive for 7 to 10 years before major overhauls become a necessity. The long-term durability is a hallmark of Kenworth engineering, with the chassis and core powertrain components built for extensive use. Weaknesses that emerge over time are often related to the increasing complexity of emissions controls and electronics, which can become more prone to failure as the vehicle ages. Consistent, high-quality maintenance is paramount to unlocking this long-term potential and mitigating costly repairs.

What Technology & Safety Features are Included?

The 2015 Kenworth T600, being a commercial vehicle, focuses on driver productivity, safety, and long-haul comfort rather than the extensive consumer-oriented tech found in passenger cars. Built-in technology primarily revolves around functional systems. Standard features often include a robust engine monitoring system with diagnostic capabilities, allowing for proactive maintenance and performance tracking. The infotainment system typically comprises an AM/FM radio, often with auxiliary input or USB for basic audio playback. More advanced entertainment systems, including CD players or satellite radio integration, were usually optional. Navigation systems were also an available upgrade, essential for long-haul trucking routes. Driver-assistance features in this era were less sophisticated than today's offerings but could include features like cruise control. Optional driver aids might have encompassed lane departure warning systems or advanced stability control, though these were not as ubiquitous as in modern trucks. Safety features are paramount in commercial vehicles; the T600 was designed with a strong cab structure, robust braking systems, and essential lighting for visibility. Air brakes are standard, and ABS (Anti-lock Braking System) is typically included. For crash-test ratings, standard passenger vehicle-style crash test data (like NCAP or IIHS) is not directly applicable or widely published for Class 8 trucks like the Kenworth T600. Instead, these vehicles are built to meet stringent Federal Motor Vehicle Safety Standards (FMVSS) for commercial vehicles, which focus on occupant protection in various impact scenarios relevant to heavy-duty trucking, including frontal impact protection and rollovers. The emphasis is on structural integrity and occupant survivability in severe conditions.

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2015 Kenworth T600 Prices and Market Value

When new, a 2015 Kenworth T600 could have a Manufacturer's Suggested Retail Price (MSRP) ranging broadly from $100,000 to over $150,000, depending heavily on engine choice, chassis configuration, sleeper options, and additional features. The used market for a 2015 Kenworth T600 in 2024 typically sees prices from $40,000 for higher mileage or basic configurations to $90,000+ for well-maintained, low-mileage trucks with premium features. Heavy-duty trucks like the T600 exhibit strong resale value compared to passenger vehicles, especially those with reputable powertrains and aerodynamic designs, as they are workhorses. Depreciation is significant in the first few years but slows considerably thereafter. Factors greatly affecting resale value include mileage, overall condition, maintenance history, tire wear, the presence of major mechanical issues, and the current market demand for reliable Class 8 trucks.

2015 Kenworth T600 Cost of Ownership

Owning a 2015 Kenworth T600 involves substantial costs. Insurance premiums are significant, reflecting the vehicle's value and the risks associated with commercial trucking. Fuel is a major ongoing expense, though the T600's efficiency helps mitigate this. Maintenance and repair costs can be high; while generally reliable, components like diesel particulate filters, complex engine systems, and heavy-duty transmissions require specialized service and can be expensive to replace. Routine maintenance is crucial to minimize unexpected repairs. Overall, while the T600 is economical in terms of fuel efficiency relative to its class, the total cost of ownership is considerable, making it a costly but potentially profitable investment for serious trucking operations.

2015 Kenworth T600 Fuel Efficiency

Fuel Type Diesel
Fuel Capacity -
City Mileage -
Highway Mileage -

2015 Kenworth T600 Warranty

Basic
Original warranty 0 months / No data
Estimated remaining Expired
Powertrain
Original warranty 0 months / No data
Estimated remaining Expired
Rust
Original warranty 0 months / No data
Estimated remaining Expired

2015 Kenworth T600 Insurance

Insurance for a 2015 Kenworth T600 is moderately priced, reflecting its status as a Truck with strong safety ratings and
reasonable repair costs.

How Does the 2015 Kenworth T600 Compare to Other Truck?

The 2015 Kenworth T600 competed directly with other premium Class 8 trucks known for their durability and driver focus. Key rivals included the Peterbilt 579, Freightliner Cascadia, and International ProStar. In terms of performance, the T600, with its PACCAR or Cummins engines, offered comparable power and torque to its competitors, often excelling in fuel efficiency due to its distinctive aerodynamic design, which was a significant differentiator. Features-wise, Kenworth typically offered a high level of customization for its sleepers and interiors, often perceived as more driver-centric and comfortable than some rivals, particularly appealing to owner-operators who spent extensive time on the road. Reliability is a strong suit for Kenworth; they are renowned for robust construction and long-term durability, often considered superior or on par with Peterbilt, a sister company. Freightliner and International also offer reliable trucks, but Kenworth and Peterbilt often command a premium for their build quality and driver comfort. Price-wise, Kenworths generally sit at the higher end of the spectrum when new, reflecting their premium positioning. On the used market, the T600 retains its value well due to its reputation.

Similar Alternatives: The Peterbilt 579 is a very close competitor, offering similar aerodynamic benefits, comfort, and reliability. The choice between a Kenworth T600 and a Peterbilt 579 often comes down to personal preference and specific dealer support.

Slightly Different Alternatives: The Freightliner Cascadia is a strong contender, often praised for its technological advancements and fuel efficiency, and can sometimes be found at a slightly more accessible price point on the used market. However, some drivers might find the Kenworth's cab more ergonomically suited for long hauls. The Volvo VNL series is another premium option known for its ride comfort and advanced safety features, but may have a different powertrain feel. Ultimately, for a blend of proven reliability, aerodynamic efficiency, and driver comfort, the 2015 Kenworth T600 remains a top-tier choice, with the Peterbilt 579 being its most direct and equally capable rival.

Final Verdict: Is the 2015 Kenworth T600 a Good Truck?

The 2015 Kenworth T600 is ideally suited for owner-operators and fleet managers prioritizing fuel efficiency, long-term reliability, and driver comfort. Its aerodynamic design makes it a smart choice for long-haul routes where mileage matters. It is absolutely worth buying, especially on the used market, provided it has a comprehensive maintenance history. Buying used is generally the most practical route, as new trucks of this class are exceptionally expensive. Look for trucks with PACCAR MX-13 or Cummins ISX engines, as these are proven workhorses. Thorough pre-purchase inspections by a qualified heavy-duty mechanic are essential, focusing on the engine, transmission, emissions system, and chassis. Specific trims with comfortable sleeper configurations are best for drivers spending extended time on the road. It represents a solid investment for those seeking a dependable and efficient work truck.

2015 Kenworth T600 Owner Reviews

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Simon A

Simon is a contributor to VinCheck, where he provides articles and reviews on various automotive topics. His work focuses on delivering accurate and up-to-date information about used cars, helping readers make informed decisions.