Kubota D902 Engine Oil Capacity Chart(Complete Guide)

The Kubota D902 is a compact, 3-cylinder, liquid-cooled diesel engine renowned for its durability, smooth operation, and low noise levels. Part of Kubota’s Super Mini Series, the D902 is widely used in small tractors, mini excavators, and industrial generators.

Let’s dive into the key oil capacity specifications, best maintenance practices, and pro-level servicing tips tailored for your Kubota D902 engine.

Kubota D902 Engine Oil Capacity Chart

Service Scenario	Oil Capacity (US Quarts)	Oil Capacity (Liters)	Notes
Initial Factory Fill	3.1 quarts	2.9 liters	Capacity before first engine start (brand new engine)
Standard Oil Change Only	2.7 quarts	2.6 liters	Draining oil only without replacing the filter
Oil Change With Filter	2.9 quarts	2.75 liters	Draining oil and replacing oil filter
Cold Weather (SAE 10W-30)	2.7–2.9 quarts	2.6–2.75 liters	Recommended for temps -20°F to 32°F
Hot Weather (SAE 15W-40)	2.7–2.9 quarts	2.6–2.75 liters	Ideal for temps above 32°F
Synthetic Oil (SAE 5W-40)	2.9 quarts	2.75 liters	Suitable for year-round use, better cold start protection

Recommended Engine Oil Brands for Kubota D902

1. Mobil 1 Turbo Diesel Truck 5W-40 (Full Synthetic)

✅ Type: Full Synthetic Diesel Engine Oil
✅ Viscosity: SAE 5W-40
✅ Key Features:
- Superior wear protection for high-load diesel engines
- Excellent cold-weather starting and flow
- Minimizes engine sludge and deposits
- Long-lasting protection between oil changes
Why It’s Recommended: Ideal for year-round use in Kubota D902 engines, especially in cold climates or variable temperature zones.

2. Shell Rotella T6 5W-40 (Full Synthetic)

✅ Type: Full Synthetic Heavy-Duty Diesel Oil
✅ Viscosity: SAE 5W-40
✅ Key Features:
- Advanced multi-functional dispersant additives
- Excellent performance under high heat and heavy load
- Protects against engine wear and oil breakdown
- Improved fuel economy compared to conventional oils
Why It’s Recommended: A versatile, top-tier synthetic oil perfect for demanding applications in Kubota D902-powered equipment.

3. Valvoline Premium Blue 15W-40 (Conventional or Synthetic Blend)

✅ Type: Conventional / Synthetic Blend Diesel Engine Oil
✅ Viscosity: SAE 15W-40
✅ Key Features:
- OEM-approved by Cummins for agricultural and industrial use
- Excellent oxidation resistance and thermal stability
- Great soot control and engine cleanliness
- Ideal for extended drain intervals in heavy-duty engines
Why It’s Recommended: Best for warmer climates and rugged operating conditions where the Kubota D902 is used intensively.

Importance of Knowing Engine Oil Capacity

Preventing Engine Damage

Insufficient or excessive oil levels can lead to:

Engine overheating
Increased wear on internal components
Oil pump failure
Seizing of engine parts

Optimizing Fuel and Engine Efficiency

Maintaining the correct oil capacity:

Reduces engine friction
Improves combustion
Enhances fuel economy
Extends engine lifespan

Oil Change Frequency for Kubota D902

Standard Service Intervals

Kubota recommends:

First oil change: After 50 hours of operation
Subsequent changes: Every 100 hours or 6 months

Heavy-Duty and Seasonal Use Cases

For harsh conditions:

Change every 75 hours
Increase frequency in dusty or high-load environments

Step-by-Step Guide to Checking and Changing Oil

Tools Required

Oil filter wrench
Drain pan
Funnel
Fresh engine oil
Torque wrench (optional)

Step-by-Step Instructions

Warm up the engine for 3-5 minutes.
Turn off engine and allow it to cool slightly.
Remove the oil drain plug and let the oil drain completely.
Replace oil filter if needed.
Tighten drain plug securely.
Pour new oil up to the fill line.
Start engine briefly and check for leaks.
Let engine sit, recheck oil level, and top off if needed.

Safety Precautions

Wear gloves and safety goggles.
Dispose of used oil responsibly.

Common Mistakes When Changing Oil

Overfilling or Underfilling Oil

Can cause frothing, pressure issues, or starvation of critical parts.

Using Incorrect Oil Type

The wrong viscosity reduces lubrication and can void the warranty.

Ignoring Oil Filter Replacement

Old filters trap contaminants and reduce oil flow efficiency.

Kubota D902 Oil Filter Information

OEM Filter Model Numbers

Kubota OEM Part: HH164-32430

Compatible Aftermarket Filters

Fram PH3593A
WIX 51334
Baldwin B1402

FAQs

What is the capacity of the Kubota D902?

The Kubota D902 engine oil capacity varies slightly based on the maintenance performed:

Initial fill (dry engine): 3.1 quarts (2.9 liters)
Oil change only: 2.7 quarts (2.6 liters)
Oil change with filter: 2.9 quarts (2.75 liters)

What is the recommended engine oil for a Kubota tractor?

Kubota recommends using SAE 10W-30 or SAE 15W-40, depending on the ambient temperature:

10W-30: Ideal for colder climates (below 32°F)
15W-40: Preferred for warmer conditions (above 32°F)
5W-40 synthetic: Suitable for all-season use and better cold starts

How much engine oil does a Kubota RTV X900 take?

The Kubota RTV X900 utility vehicle uses the D902 engine and typically requires:

2.9 quarts (2.75 liters) of engine oil with a filter change

It’s important to check the dipstick after filling to ensure the proper oil level.

Is a Kubota D902 a good engine?

Yes, the Kubota D902 is widely regarded as a reliable and efficient engine. It’s known for:

Long engine life
Low emissions and noise
High fuel efficiency
Minimal maintenance requirements

It’s a preferred choice for compact equipment in agriculture, construction, and industrial applications.

What is the Kubota D902 engine used in?

The Kubota D902 is commonly used in:

Mini tractors and mowers
Utility vehicles (e.g., RTV X900)
Compact excavators
Portable generators
Skid steer loaders
Industrial pumps and light construction equipment

Its compact size and performance make it ideal for small machinery across various industries.

Final words

Maintaining your Kubota D902 engine starts with understanding its oil capacity chart and adhering to recommended maintenance schedules. Taking the time to check oil levels, use the correct type of oil, and change filters regularly ensures long-term performance and reliability.