2019 Honda Odyssey Fluid Specifications & Capacities

As an ASE-certified master technician, I know that keeping up with factory fluid specifications is the absolute most critical part of vehicle longevity. The 2019 Honda Odyssey (equipped with the 3.5L J35Y6 V6 engine) is a fantastic family hauler, but it is incredibly sensitive to fluid types—especially when it comes to the transmission and cooling systems.

Below is the comprehensive, factory-spec fluid guide for the 2019 Honda Odyssey to keep it running smoothly and avoid costly repairs.

Quick reference

Fluid	Type/Spec	Capacity
Engine Oil	0W-20 (API SN/SP, ILSAC GF-5/GF-6)	5.7 quarts (with filter)
Engine Coolant	Honda Long Life Antifreeze/Coolant Type 2 (Blue)	1.93 - 2.1 gallons
Transmission Fluid (9-Speed)	Honda ATF Type 3.1	3.5 quarts (drain and refill)
Transmission Fluid (10-Speed)	Honda ATF Type 2.0	4.5 quarts (drain and refill)
Brake Fluid	Honda Heavy Duty Brake Fluid DOT 3	Fill to MAX line
Power Steering Fluid	N/A (Electric Power Steering)	N/A
Windshield Washer Fluid	Standard Washer Fluid	~1 gallon

Note: Capacities are approximate. Always verify the fluid level using the factory dipstick, level plug, or electronic level check procedure where applicable.

Engine Oil

For the 3.5L V6 engine in the 2019 Odyssey, Honda specifies 0W-20 viscosity motor oil. You should look for oil that meets or exceeds the API SN (or newer API SP) and ILSAC GF-5 (or newer GF-6A) certification standards.

Capacity: 5.7 quarts (5.4 liters) when replacing the oil and filter.

Intervals & Pitfalls: Honda uses the Maintenance Minder system to indicate when an oil change is due (usually displaying a Code "A" or "B"). Depending on your driving habits, this usually falls between 5,000 and 7,500 miles. Always use a high-quality synthetic 0W-20. The primary pitfall here is neglecting the oil level between changes. The J35 V6 is known to consume a small amount of oil under heavy loads, so check the dipstick at least once a month.

Engine Coolant

Honda vehicles are very particular about coolant chemistry. The factory specification is Honda Long Life Antifreeze/Coolant Type 2. This is a Phosphated Organic Acid Technology (POAT) coolant and it is dyed blue.

Capacity: Approximately 1.93 to 2.1 gallons, depending on if you have the auxiliary rear heater system.

Intervals & Pitfalls: The factory Type 2 coolant is pre-mixed 50/50 with deionized water—do not add water to it! A massive pitfall is mixing this with universal "all makes, all models" green or orange coolants. Universal coolants often contain silicates or borates, which will degrade the Honda water pump seals and cause premature failure. If you are in a pinch and must use a non-Honda coolant, ensure it is a silicate-free POAT formula explicitly stating compatibility with Asian blue coolants. The factory fill is designed to last 10 years or 100,000 miles, with subsequent changes every 5 years or 50,000 miles.

Transmission Fluid

This is the most critical section for the 2019 Honda Odyssey, as there are two completely different transmissions used in this model year depending on the trim level. Getting this wrong can result in catastrophic transmission failure.

9-Speed Automatic (LX, EX, EX-L trims): These trims use a ZF-sourced 9-speed transmission. The required fluid is Honda ATF Type 3.1. Capacity: ~3.5 quarts for a standard drain and refill. Warning: Type 3.1 is a highly specialized, amber-colored fluid. It is extremely expensive, but you absolutely cannot substitute it with any standard or universal ATF. Doing so will destroy the transmission's internal clutches.

10-Speed Automatic (Touring and Elite trims): These higher trims feature a Honda-built 10-speed transmission. The required fluid is Honda ATF Type 2.0. Capacity: ~4.5 quarts for a standard drain and refill. Warning: Do not confuse this with older Honda ATF DW-1 or ATF-Z1. Type 2.0 has an ultra-low viscosity designed specifically for the tight tolerances of the 10-speed gearbox.

Intervals & Pitfalls: Follow the Maintenance Minder (Code "3"). Usually, transmission fluid service is recommended every 30,000 to 45,000 miles under severe duty. Never perform a high-pressure machine flush on these transmissions; always stick to the factory drain-and-refill procedure.

Brake Fluid

Honda specifies Honda Heavy Duty Brake Fluid DOT 3. You can also safely use a high-quality aftermarket DOT 3 or DOT 4 fluid from a sealed container.

Capacity: As needed to reach the MAX line on the master cylinder reservoir.

Intervals & Pitfalls: Honda uniquely recommends replacing the brake fluid every 3 years regardless of mileage. Brake fluid is hygroscopic (it absorbs moisture from the air). Over time, this moisture lowers the boiling point of the fluid, which can lead to brake fade on long descents or heavy braking, as well as internal corrosion of the ABS module. Never use DOT 5 (silicone-based) fluid in this system.

Power Steering Fluid

The 2019 Honda Odyssey is equipped with Electric Power Steering (EPS). There is no hydraulic power steering pump, no hoses, and no fluid to check or replace. One less thing to worry about!

Windshield Washer Fluid

You can use any standard windshield washer fluid. If you live in an area that experiences freezing temperatures, ensure you are using a winter-grade fluid rated for well below freezing (usually -20°F or lower) to prevent the reservoir and lines from cracking. Do not use engine antifreeze in the washer reservoir.

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Proper fluid maintenance is the secret to getting 200,000+ trouble-free miles out of your Odyssey. If you aren't comfortable tackling these services yourself, especially the highly specific transmission fluid procedures, leave it to the professionals.

Find a trusted shop on Repairius.