The 2018 Honda Odyssey with its 3.5 L V6 engine typically requires about 5.7 quarts (roughly 5.4 liters) of engine oil when you perform an oil change that includes replacing the filter.
Understanding the capacity specification
Engine oil capacity is published by Honda as the amount needed to fill the system from empty with a new oil filter. In real‑world service, the precise amount can vary slightly due to factors such as draining efficiency, minor variations between individual engines, and whether you replace the filter during the change.
With filter versus without filter
When quoted as "with filter," the 5.7-quart figure includes the oil required for a new oil filter. If you were to measure oil without the filter, the capacity would be a little less, and you should factor that in when topping up after a filter change.
Oil type and viscosity considerations
Honda generally recommends synthetic 5W-20 engine oil for most 3.5 L V6 powertrains in North America, though some climates or dealer recommendations may call for 0W-20. Always verify with the owner's manual or your dealer for your specific vehicle and region.
Practical steps for an oil change
For an accurate refill after draining the old oil and replacing the filter, plan to add about 5.7 quarts and then check the dipstick. Run the engine briefly, shut it off, wait a few minutes, and recheck the level. Add small increments if needed to reach the full mark on the dipstick.
Safety and best practices
Use the appropriate drain plug torque and dispose of used oil at a proper recycling facility. If you are unsure about the process, consult a professional technician to avoid overfilling or leaks.
Summary
In short, the 2018 Honda Odyssey's 3.5 L V6 holds about 5.7 quarts (5.4 liters) of engine oil when changing the filter. Always confirm the exact specification in your owner's manual and use the recommended oil type and viscosity for your climate and driving conditions. After an oil change, verify the level with the dipstick and reset your maintenance reminders as needed.