2023 Honda Civic coolant capacity
The 2023 Honda Civic holds about 5.9 to 7.1 quarts of coolant, depending on the engine - the full cooling-system capacity when cold. The factory coolant is Honda Long Life Antifreeze/Coolant Type 2 (blue).
Key takeaways
- The 2023 Honda Civic holds about 5.9 to 7.1 quarts of coolant total, depending on engine.
- This is the full cooling-system fill with the engine cold.
- Coolant: Honda Long Life Antifreeze/Coolant Type 2 (blue). Refill to the marked level and don't mix coolant types.
| Engine | Capacity | Liters |
|---|---|---|
| 1.5L 4-cyl turbo (L15BY), 5.9-6 qt by version | 6 qt | 5.7 L |
| 1.5L 4-cyl turbo (L15CA) | 5.9 qt | 5.6 L |
| 2.0L 4-cyl turbo (K20C1) | 7.1 qt | 6.7 L |
| 2.0L 4-cyl (K20C2), 6-6.2 qt by version | 6.2 qt | 5.9 L |
Which coolant the 2023 Honda Civic takes
The factory coolant is Honda Long Life Antifreeze/Coolant Type 2 (blue). Mixing coolant types can cause sludge and corrosion, so top up with the same product, or drain and refill completely when you switch.
Source: 2006 Civic Sedan Owner's Manual (ACV0606OM), 2006 Accord Coupe Owner's Manual (AAD0606OM). Confirm against your owner's manual or the label on the coolant reservoir.
What a coolant change costs
At roughly 1.5 to 1.8 gallons of capacity, the coolant itself is about $23 to $54. A shop charges $70 to $120 for a drain and fill, or $100 to $250 for a full flush. Use the specification the manufacturer lists - mixing coolant chemistries is what turns a cheap service into a water-pump job.
Ranges aggregated from published 2026 US repair-cost and parts price guides, including RepairPal and Car Talk. Prices vary by region, brand, and vehicle - treat these as a sanity check on a quote, not a fixed price. Drain and fill vs flush →
Coolant for your 2023 Honda Civic
Buy Honda Long Life Antifreeze/Coolant Type 2 (blue), or a coolant that says on the jug it meets the same spec. Check whether it is premixed 50/50 or concentrate before you pour. To compare prices and reviews:
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