2025 International LT Oil Capacity & Filter Specs
AI-generated reference. Always verify torque values, fluid capacities, intervals, and procedures against the manufacturer's service manual or OEM repair information before performing work. Repairius is not liable for damage from acting on this content without verification.
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The 2025 International LT equipped with the S13 engine requires an oil capacity of 42 quarts (39.8 liters) of 10W-30 or 15W-40 diesel engine oil.
Quick Answer
- Oil Capacity: 42 quarts / 39.8 liters
- Recommended Oil Weight: 10W-30 or 15W-40
- Oil Specification: API CK-4 / FA-4
- Oil Filter OEM Part Number: Consult dealer for OEM part number.
- Aftermarket Cross-References:
- Fram: Consult dealer or parts supplier.
- Wix: Consult dealer or parts supplier.
- Mobil 1: Consult dealer or parts supplier.
Capacity by Engine Option
| Engine | Oil Capacity (Quarts) | Oil Capacity (Liters) |
|---|---|---|
| International S13 | 42 | 39.8 |
| Cummins X15 | 14 gal | 52.9 L |
Oil Change Interval
The oil change interval for the 2025 International LT depends on the duty cycle of the truck.
- Normal Duty: For trucks operating under normal conditions, the recommended oil change interval is up to 100,000 miles (160,000 km). This is dependent on the results of oil sample analysis. Always consult your owner's manual and engine manufacturer's recommendations.
- Severe Duty: For trucks operating under severe conditions, such as frequent idling, heavy loads, or dusty environments, the recommended oil change interval is 25,000 to 35,000 miles (40,000 to 56,000 km). Again, oil sample analysis is the best way to determine the appropriate interval.
Drain Plug Torque
The recommended drain plug torque for the 2025 International LT is 37 ft-lbs (50 Nm). Always use a new crush washer to ensure a proper seal.
How to Change the Oil
- Run the engine for a few minutes to warm the oil.
- Park the truck on a level surface and engage the parking brake.
- Place a drain pan under the oil pan.
- Remove the drain plug and allow the oil to drain completely.
- Remove the old oil filter. Be sure to have a drain pan ready to catch any residual oil.
- Apply a thin layer of new oil to the gasket of the new oil filter.
- Install the new oil filter and tighten it according to the manufacturer's instructions.
- Install the drain plug with a new crush washer and torque it to 37 ft-lbs (50 Nm).
- Fill the engine with 42 quarts (39.8 liters) of new 10W-30 or 15W-40 diesel engine oil.
- Start the engine and let it run for a few minutes to circulate the new oil.
- Check the oil level and add more if necessary.
- Dispose of the old oil and filter properly.
Common Issues / Tips
- The International S13 engine is known for its fuel efficiency and long service intervals. To maximize the life of your engine, it is important to use the correct oil and to follow the recommended oil change intervals.
- Oil sample analysis is a great way to monitor the health of your engine and to determine the optimal oil change interval for your specific operating conditions.
- When changing the oil, be sure to use a high-quality oil filter. A cheap oil filter can clog easily and restrict oil flow, which can lead to engine damage.
- Always use a new crush washer when installing the drain plug. This will help to prevent leaks.
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More specs for the 2025 International LT
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2025 International LT Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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