International S13 Engine Oil & Fluid Change Guide | Recommended Intervals, Capacities, and Filter Part Numbers
There’s a certain peace of mind that comes with knowing your engine has the right fluids and filters—especially when you’re thousands of miles from home with a load that needs to deliver on time.
Proper maintenance of the International S13 Integrated Powertrain isn’t just about following a schedule. It’s about using the right products in the right quantities at the right intervals. The S13 was engineered as a complete system, and using unapproved chemicals can compromise its performance and longevity . This guide covers the essential fluid capacities, recommended service intervals, and critical part numbers for keeping your S13 running at its best.
TL;DR
The International S13 Integrated Powertrain requires careful attention to approved lubricants and fluids . The engine oil capacity is 47.5 quarts (45 liters) with a recommended viscosity of FA-4 or CK-4 . Key service items include the oil filter, fuel filters, and coolant, all of which must meet specific OEM specifications. The DPF service interval extends to 650,000 miles under optimal conditions . Always use genuine International-approved chemicals, as the powertrain has been validated only with these specific products . The S13 is supported by a 24-month/unlimited-mile base engine warranty, with extended coverage options available .
Key Takeaways
- Engine Oil Capacity: 47.5 quarts (45 liters) total system capacity .
- Approved Oil Standards: Use FA-4 or CK-4 grade oils as specified by International .
- DPF Service Life: Diesel Particulate Filter service interval is 650,000 miles under normal conditions .
- Approved Chemicals Required: The S13 Powertrain has been validated only with specific chemicals (Loctite 270, Dowsil 7091, Molykote em30-l, and Renolit mp735 engine bearing lube) .
- Warranty Coverage: Base engine warranty is 24 months/unlimited miles; major components covered for 60 months/500,000 miles .
- Service Contracts: Planned maintenance contracts through International dealers reduce technician training requirements and optimize parts inventory .
Understanding the S13 Integrated Powertrain
The International S13 Integrated Powertrain represents a fundamental shift in heavy-duty engine design. This 12.74L inline-6 diesel produces up to 515 hp and 1,850 lb-ft of torque, with a 23:1 compression ratio that’s among the highest in the industry . The S13 is unique because it eliminates the EGR cooler and diesel oxidation catalyst (DOC), reducing complexity and eliminating the need for active regenerations .
The engine is paired with the T14 14-speed automated manual transmission, creating a fully integrated system that shares the same software for perfectly timed shifts. This integration extends to the powertrain’s fluid requirements—everything is designed to work together, and using the wrong products can compromise performance.
Key Specifications :
| Specification | Detail |
|---|---|
| Displacement | 12.74L (777 cu. in.) |
| Horsepower | Up to 515 hp |
| Torque | Up to 1,850 lb-ft |
| Compression Ratio | 23:1 |
| Engine Lubrication Capacity | 47.5 quarts (45L) |
| Dry Weight | 2,284 lbs |
| Aspiration | Fixed Geometry Turbocharger |
| B10 Design Life | 1,200,000 miles |
Engine Oil: Capacity, Viscosity, and Standards
Oil Capacity
The International S13 engine has a total lubrication system capacity of 47.5 quarts (45 liters) . When performing an oil change, you’ll need this quantity to fill the system completely. Always check the dipstick after filling to confirm the correct level.
Approved Oil Standards
The S13 has been validated specifically with FA-4 or CK-4 grade engine oils . These are the current API service categories for heavy-duty diesel engines:
- CK-4: Introduced in 2016, designed for high-speed four-stroke diesel engines meeting 2017 emissions standards. It provides improved protection against oil degradation, oxidation, and aeration.
- FA-4: Also introduced in 2016, specifically for high-speed four-stroke diesel engines designed to meet 2017 greenhouse gas emissions standards. FA-4 oils have lower high-temperature viscosity, which improves fuel economy.
Important: The S13 Powertrain has been validated only with specific approved chemicals and lubricants . Do not substitute with unapproved oils, even if they meet the same API classification. International emphasizes that using the correct products is essential for long-term durability and warranty coverage.
What about other fluids like transmission oil and coolant?
Approved Chemicals and Sealants
International Service Bulletin IK4300031 provides critical information on approved chemicals for the S13 Powertrain and T14 Transmission (Model Years 2023-2026) .
Key Approved Products:
| Product | Application |
|---|---|
| Omnifit 200 m | General-purpose sealant |
| Dowsil 7091 | Silicone sealant |
| Loctite 270 | Thread locker (Note: Loctite 271 is NOT an acceptable substitute) |
| Molykote em30-l | Lubricant |
| Renolit mp735 | Engine bearing lube |
| Loctite Graphite 50 | Aftertreatment lubricant |
Important Notes :
- These chemicals are generally not stocked in International Parts Distribution Centers (PDCs)
- They must be sourced through direct drop-ship or local suppliers
- Use clean containers to avoid contamination
- Adhere to shelf-life windows for chemical efficacy
- For specific repair procedures, consult the powertrain and chassis service manuals alongside this chemical requirement list
Oil Filter and Fuel Filter Information
Oil Filter
The S13 uses a specific oil filter element that must meet International’s specifications. The oil filter is an essential component for maintaining oil cleanliness and protecting engine bearings and components.
Service Note: During an oil change, always replace the oil filter. The filter captures contaminants that accumulate during operation, and reusing a filter can reintroduce those contaminants to the clean oil. The combination of genuine International-approved filters and the correct oil is essential for maintaining the engine’s extended service intervals .
Fuel Filters
The S13’s dual-stage aftertreatment system requires clean fuel for optimal operation. Water in diesel fuel is a particular concern for modern high-pressure common rail systems, and proper fuel filtration is critical .
Fuel Filter Service:
- Replace fuel filters at recommended intervals (consult your service manual for specific schedules based on operating conditions)
- Use only International-approved fuel filters
- After filter replacement, prime the system according to the service manual procedure
- Check for leaks after priming
What about the DPF? When does it need service?
DPF Service Interval
One of the most significant maintenance advantages of the S13 is its extended DPF service interval. Because the engine produces less soot through its clean combustion cycle, the DPF does not need to be cleaned or replaced until 650,000 miles under normal operating conditions .
This is a substantial improvement over many competing engines, which may require DPF cleaning as early as 200,000-300,000 miles. The elimination of the diesel oxidation catalyst (DOC) and the dual-stage aftertreatment design contribute to this extended interval .
DPF Maintenance Tips:
- The system manages regeneration during operation with no driver interaction required
- Avoid excessive idling, which can accelerate soot buildup
- For vocational applications with stop-and-go operation, monitor DPF status regularly
- The DPF should only be serviced by trained technicians with proper equipment
What warranties protect my S13 investment?
Warranty Coverage: Protecting Your Investment
The S13 Integrated Powertrain comes with comprehensive warranty coverage that protects against defects and provides peace of mind .
Standard Warranty Coverage
| Component | Coverage |
|---|---|
| Base Engine | 24 months; unlimited miles, unlimited hours |
| Base Major Component | 60 months; 500,000 miles |
| Base Towing | 24 months; unlimited miles, unlimited hours |
| Dual Stage Aftertreatment | 2 years; unlimited miles, unlimited hours |
| Transmission | 5 years; 750,000 miles |
| Clutch | 3 years; 350,000 miles |
Extended Warranty Options
| Component | Coverage |
|---|---|
| Optional Engine | Up to 72 months; 600,000 miles |
| Optional Major Component | Up to 84 months; 700,000 miles |
The S13’s integrated design means warranty responsibility is clear and faster to resolve. As one fleet operator noted, “That integrated powertrain—and the PTO being part of it—cleans up warranty responsibility. It’s clearer, faster and better for uptime” .
Service Contracts: Planned Maintenance Programs
International offers Planned Maintenance contracts for S13-equipped vehicles, delivered through the dealer network .
Benefits of Planned Maintenance Contracts :
- Planned maintenance performed with genuine OEM parts and lubricants
- Proactive service communication and preventive maintenance scheduling
- Work performed by highly skilled technicians trained on the S13
- Zero-deductible extended service contract coverage with no claims maximums
- Backed by over 500 service locations across North America
- 84-point inspection included
These contracts minimize impact to fleet operations by reducing technician training requirements and optimizing parts inventory and service tool requirements . They also provide predictability when it comes to costs and simplified billing.
Frequently Asked Questions
What is the oil capacity of the International S13 engine?
The S13 engine has a total lubrication system capacity of 47.5 quarts (45 liters) .
What type of oil does the S13 require?
The S13 requires FA-4 or CK-4 grade engine oils that meet International’s specifications. Only use approved chemicals, as the powertrain has been validated with specific products .
How often does the DPF need service on the S13?
The DPF does not need to be cleaned or replaced until 650,000 miles under normal operating conditions .
What is the warranty on the S13 engine?
The base engine warranty is 24 months with unlimited miles, while major components are covered for 60 months or 500,000 miles .
Where can I find approved chemicals for the S13?
International Service Bulletin IK4300031 lists approved chemicals including Omnifit 200 m, Dowsil 7091, Loctite 270, and Renolit mp735. These are generally not stocked in PDCs and must be sourced through direct drop-ship or local suppliers .
Can I use Loctite 271 instead of Loctite 270?
No. International specifically warns that Loctite 271 is NOT an acceptable substitute for Loctite 270 on the S13 .
Does the S13 require active regenerations?
No. The S13’s combustion design eliminates the need for driver-initiated active regenerations. The system manages regeneration during operation automatically .
References
Explore Official International Resources:
- International Trucks Official Site
- International S13 Integrated Powertrain
- International Service Contracts
- DOT.report: International S13 & T14 Approved Chemicals (IK4300031)
Have you experienced the S13 Integrated Powertrain’s performance firsthand? What maintenance questions do you have? Share your stories and questions in the comments below.
