When it comes to heavy-duty diesel trucks, the Ford Super Duty lineup often tops the list. A significant reason for its popularity lies under the hood — the 6.7L Power Stroke diesel engine. First introduced in 2011, this engine has evolved over the years to become one of the most powerful and reliable options in the segment. But with any engine, especially a diesel, potential buyers and current owners always ask the same question: Is the 6.7 Power Stroke a good engine? Let’s break down its performance, reliability, pros, cons, and real-world reputation to help answer that question.
Is the 6.7 Power Stroke a Good Engine?
A Quick Overview of the 6.7 Power Stroke
Ford’s proprietary 6.7L Power Stroke V8 turbo diesel engine has replaced the troublesome 6.4L Power Stroke that was created in collaboration with Navistar. It was a fresh start for Ford, and over the years, it has gone through several revisions. As of the latest versions (2020+), the engine is producing up to 475 horsepower and 1,050 lb-ft of torque — a massive leap from its initial output in 2011.
This engine is primarily used in Ford’s Super Duty trucks like the F-250, F-350, and F-450. It’s designed to tow, haul, and handle the most demanding workloads.
Strengths of the 6.7 Power Stroke
1. Impressive Power and Torque
The latest versions of the 6.7 Power Stroke offer class-leading power and torque. Whether you’re towing a horse trailer, a large RV, or heavy construction equipment, this engine delivers serious pulling power.
2. Reliability Improvements
Ford made major strides in reliability after parting ways with Navistar. The 6.7 Power Stroke has proven far more dependable than its predecessors (especially the 6.0L and 6.4L engines). Key improvements include a stronger compacted graphite iron (CGI) block, a reverse-flow layout for improved cooling, and a single variable-geometry turbocharger.
3. Fuel Efficiency (For Its Class)
The 6.7 Power Stroke gets respectable mileage for a full-size truck, even if no heavy-duty diesel is actually “fuel efficient.” Many owners report highway mileage in the range of 15–20 mpg, depending on load and driving habits.
4. Smooth Driving Experience
Compared to older diesels, the 6.7 is relatively quiet and smooth. The 10-speed automatic transmission (in newer models) pairs nicely with the engine, providing seamless shifts and improved drivability.
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Common Issues and Concerns
No engine is perfect, and the 6.7 Power Stroke has had its share of issues, particularly in early model years.
1. EGR and Emissions Systems
Like many modern diesels, emissions components can be a pain point. EGR coolers, DPF (Diesel Particulate Filter), and SCR (Selective Catalytic Reduction) systems have been known to fail or require service over time. These systems can also clog or cause drivability issues if not properly maintained.
2. CP4 Fuel Pump Failures
Earlier versions of the 6.7 (2011–2019) used the Bosch CP4 high-pressure fuel pump, which has been known to fail catastrophically. This often leads to metal shavings entering the fuel system, requiring costly repairs. Ford has since updated the pump design in newer models.
3. Cost of Maintenance
Heavy-duty diesels aren’t cheap to maintain, and the 6.7 Power Stroke is no exception. Oil changes, fuel filters, and DEF fluid all add to ownership costs. However, this is true for all HD diesel engines, not just Ford’s.
Real-World Owner Opinions
Among truck owners, the 6.7 Power Stroke generally has a good reputation. Its smooth running, increased dependability, and towing capacity are praised by many. It’s a favorite among RVers, contractors, and fleet operators who need dependable power day in and day out. That said, some users still prefer older, pre-emissions diesels (like the 7.3 Power Stroke) for their simplicity and ease of maintenance.
So, Is the 6.7 Power Stroke a Good Engine?
Yes — the 6.7 Power Stroke is widely considered a good engine, especially in its second and third generations (2015+). Ford addressed many of the early issues and has continued to refine the engine with each model year. If you’re in the market for a powerful and capable diesel truck, the 6.7 Power Stroke-equipped Super Duty is a solid choice — as long as you’re prepared for the maintenance demands that come with any modern diesel.
Final Thoughts
Whether you’re hauling heavy loads, towing across the country, or just want the bragging rights of 1,000+ lb-ft of torque, the 6.7 Power Stroke delivers. It has proven to be a strong, reliable engine with the power and tech to keep up with modern demands. Just make sure to stay on top of maintenance and research the model year you’re considering, and you’ll likely have a truck that serves you well for many miles.