2016 Kenworth T680 Fluid Type Specifications
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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Quick reference
| Fluid | Type/Spec | Capacity (approx.) |
|---|---|---|
| Engine Oil | API CK-4 / FA-4 (varies) | 38-48 quarts (depending on engine) |
| Engine Coolant | PACCAR/Kenworth Extended Life Coolant (ELC) - OAT | 50-60 quarts (varies) |
| Transmission Fluid | Eaton PS-386, Eaton PS-278, or OEM specific | 14-20 quarts (varies by model) |
| Differential Oil | SAE 75W-90 / 80W-90 API GL-5 (Meritor/Dana specific) | 15-25 pints per axle (varies) |
| Brake Fluid | DOT 4 or DOT 5.1 (Heavy-duty Air Brake Systems) | As required |
| Power Steering Fluid | Eaton PS-164, Dexron III/Mercon, or OEM specific | 10-15 quarts (varies) |
| Washer Fluid | Commercial-grade all-season washer fluid | 1-1.5 gallons |
| DEF | ISO 22241 (Aqueous Urea Solution - AUS 32) | 15-25 gallons (varies) |
Engine Oil
The 2016 Kenworth T680, depending on its specific engine (PACCAR MX-13, Cummins ISX15, etc.), will require a heavy-duty diesel engine oil. For modern diesel engines, the primary specifications are API CK-4 and API FA-4. It is crucial to verify which specification is required for your particular engine as FA-4 oils are lower viscosity and designed for improved fuel economy in certain engines, and are not backward compatible with all engines requiring CK-4. Always consult your owner's manual or the engine manufacturer's guidelines.
Common Specs:
- API CK-4: Designed for use in high-speed four-stroke diesel engines and compatible with older engines where API CJ-4, CI-4 Plus, CI-4, and CH-4 oils are recommended. Most common for the MX-13 and ISX15 engines for general use.
- API FA-4: Specifically designed for certain 2017 and newer heavy-duty diesel engines to provide optimized fuel economy benefits, typically not recommended for engines prior to 2017 or for off-road use unless explicitly stated by the manufacturer. Some later 2016 models might spec this, but verification is critical.
Capacity: Engine oil capacity can vary significantly based on the specific engine model and pan size, ranging from approximately 38 to 48 quarts (9.5 to 12 gallons).
Intervals and Pitfalls: Engine oil and filter change intervals for heavy-duty trucks like the T680 are highly dependent on operating conditions, engine hours, and oil analysis results. Extended drain intervals are common with modern synthetic oils and advanced filtration systems, but adherence to OEM recommendations and regular oil analysis is paramount. Using the incorrect API specification, especially FA-4 where CK-4 is required, can lead to inadequate wear protection. Always use high-quality filters that meet OEM specifications.
Engine Coolant
Kenworth T680 trucks equipped with PACCAR MX-13 engines, and generally all late-model Kenworths, will use an Extended Life Coolant (ELC). This is typically an Organic Acid Technology (OAT) coolant, dyed red or purple, sometimes referred to as a
More specs for the 2016 Kenworth T680
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
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
2016 Kenworth T680 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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