What size socket to change oil in Honda?

The drain plug on most Honda engines is a 14mm socket, which covers the vast majority of models. Some older or less common engines may use a 12mm or 17mm plug, so always verify in the owner's manual or by inspecting the plug head.

Common sizes you’re likely to encounter

Here’s a practical guide to the drain plug head sizes you’ll typically see when performing an oil change on a Honda. Sizes are given as the standard hex across flats.

• 14mm: The vast majority of modern Honda engines (Civic, Accord, CR-V, Fit, HR-V, Pilot, and many others) use a drain plug that fits a 14mm socket. A standard 14mm socket (6-point is common) is usually sufficient.


• 12mm: A small subset of older or specialized engines may use a 12mm drain plug. If a 14mm doesn’t fit, carefully try a 12mm socket—do not force it.


• 17mm: Very rare on Honda cars; if you encounter a plug requiring 17mm, switch to that size and consult the manual for torque specs.

In practice, 14mm covers most Hondas. If you’re unsure, consult the owner's manual or contact a dealer to confirm the exact size for your model. The oil fill cap and oil filter require separate tools from the drain plug.

How to verify the exact size for your Honda

To ensure you’re using the correct socket for your exact model and engine code, follow these verification steps:

1. Check the owner’s manual or service manual for the specified drain plug size for your model.


2. Compare the plug head directly to common socket sizes at a parts store or with a caliper to confirm the best fit.


3. If you’re still unsure, contact a dealer or a qualified mechanic with your vehicle’s VIN for confirmation.

Using the correct size helps prevent stripping the drain plug or pan threads and ensures a proper seal when reinstalling.

Summary

For most Honda oil changes, a 14mm socket will do the job. If the 14mm plug doesn’t fit, verify with the manual or model-specific guidance to see whether a 12mm or 17mm size is required. Always follow the manufacturer’s torque specifications and use the appropriate tools for the oil filter and fill cap as well.