What engine does the Cummins C3000 D6 use?

The C3000 D6 uses the Cummins QSK95-G2 -- a 95-liter, V-16 diesel engine. This is Cummins' largest displacement engine platform, purpose-built for the 3000-3500 kW mega-diesel class.

What are the standby and prime ratings of the C3000 D6?

Standby rating is 3000 kW (3750 kVA) at 60 Hz, 0.8 power factor. Prime rating is 2730 kW (3413 kVA). Both at 1800 rpm, 60 Hz, three-phase.

What are the service intervals for the C3000 D6?

Oil and filter changes are due at 500 hours or 12 months. Air filter replacement at 1,000-hour intervals. Fuel filter at 500 hours. Coolant flush at 6,000 hours. Major overhaul interval is 40,000 hours under standard standby duty conditions.

How does the C3000 D6 compare to the C3000 D6e (Centum)?

Both deliver 3000 kW standby. The C3000 D6 uses the traditional D6 platform with the QSK95-G2 engine, while the C3000 D6e (Centum Series) uses the QSK78-G37 engine with a smaller footprint, charged air-cooled intake, and PowerCommand 3.3 controller. The Centum is optimized for data center applications with a premium, single-source design.

Can {company} service the C3000 D6 in Northern California?

Yes. OnPoint Generators provides authorized Cummins service for mega-diesel generators across the San Francisco Bay Area and Northern California. The QSK95 V-16 requires specialized tooling and factory-trained technicians. We use Cummins INSITE diagnostics on every service visit.

Cummins · Cummins D6 Commercial Diesel

Cummins C3000 D6

Name: Cummins C3000 D6
Brand: Cummins
SKU: c3000-d6

3000 kW standby / 2730 kW prime · Diesel · Liquid-cooled

3000 kW diesel standby generator with QSK95-G2 95L V-16 engine. PowerCommand control, liquid-cooled, for data center, utility, and mission-critical standby applications requiring 3 MW single-engine power.

Standby power: 3000 kW / 2730 kW prime
Voltage options: 277/480V, 346/600V, 4160V, 12470V, 13800V
Frequency / Phase: 60 Hz · 3-phase
Engine: Cummins QSK95-G2 · 95L
EPA / Emissions: Tier 2

Data Centers Manufacturingparalleling-arrayutility

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Overview#

The Cummins C3000 D6 is a 3000 kW (3 MW) standby diesel generator set powered by the QSK95-G2 -- a 95-liter, V-16 diesel engine. Rated at 3750 kVA standby and 3413 kVA prime at 60 Hz, the C3000 D6 is the entry point to Cummins' largest displacement mega-diesel platform, delivering 3 MW from a single engine.

The QSK95-G2 is Cummins' flagship diesel engine for power generation, with 95 liters of displacement providing substantial thermal headroom for sustained operation at the 3 MW level. Hyperscale data centers and large industrial complexes specify 3 MW genset modules as building blocks for 12-30 MW paralleling arrays with N+1 or 2N redundancy. The C3000 D6 delivers this capacity with full Cummins vertical integration.

Medium-voltage output options (4160V, 12470V, 13800V) are standard for this power class. PowerCommand 2.3/3.3 paralleling controllers enable multi-genset arrays with load management, protective relaying, and utility paralleling capability. Fuel consumption runs approximately 210 gallons per hour at full rated load.

Engineering specifications

Fuel system & runtime

Fuel use @ full load: 210 GPH
Fuel use @ 75% load: 158 GPH
Fuel use @ 50% load: 109 GPH

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Fuel tank capacity

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GPH

Estimated runtime

1.2 hours(0.1 days)

Fuel consumption ≈ 162.00 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.

Service intervals

Manufacturer-recommended intervals for the Cummins C3000 D6 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter: Every 500 hours or 12 months
Air filter: Every 1000 hours
Fuel filter: Every 500 hours
Major overhaul: ≈ 40,000 hours

Common failure modes

What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.

Component	Symptom	Typical hours	Severity
Fuel injection system (MCRS)	Injector fault codes, rough running, cylinder imbalance across V-16 banks	—	moderate
Turbocharger system	Reduced boost pressure, excessive exhaust smoke, turbo bearing wear	—	moderate
Cooling system (high-capacity radiator)	Coolant temperature exceedances, system pressure loss under sustained load	—	severe
Fuel quality / tank degradation	Filter clogging, hard starting, injector fouling from stagnant fuel	—	moderate
Starting system (24V battery bank)	Slow crank on 95L displacement, failed start on infrequently exercised units	—	minor

Frequently Asked Questions

What engine does the Cummins C3000 D6 use?: The C3000 D6 uses the Cummins QSK95-G2 -- a 95-liter, V-16 diesel engine. This is Cummins' largest displacement engine platform, purpose-built for the 3000-3500 kW mega-diesel class.
What are the standby and prime ratings of the C3000 D6?: Standby rating is 3000 kW (3750 kVA) at 60 Hz, 0.8 power factor. Prime rating is 2730 kW (3413 kVA). Both at 1800 rpm, 60 Hz, three-phase.
What are the service intervals for the C3000 D6?: Oil and filter changes are due at 500 hours or 12 months. Air filter replacement at 1,000-hour intervals. Fuel filter at 500 hours. Coolant flush at 6,000 hours. Major overhaul interval is 40,000 hours under standard standby duty conditions.
How does the C3000 D6 compare to the C3000 D6e (Centum)?: Both deliver 3000 kW standby. The C3000 D6 uses the traditional D6 platform with the QSK95-G2 engine, while the C3000 D6e (Centum Series) uses the QSK78-G37 engine with a smaller footprint, charged air-cooled intake, and PowerCommand 3.3 controller. The Centum is optimized for data center applications with a premium, single-source design.
Can OnPoint Generators service the C3000 D6 in Northern California?: Yes. OnPoint Generators provides authorized Cummins service for mega-diesel generators across the San Francisco Bay Area and Northern California. The QSK95 V-16 requires specialized tooling and factory-trained technicians. We use Cummins INSITE diagnostics on every service visit.

Compatible equipment

Transfer switches

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