How to put gas in a 2020 Honda Civic?

To fuel a 2020 Honda Civic, open the left-rear fuel door, access the filler neck, and fill with unleaded gasoline until the pump automatically stops, then reseal and close. Use a regular unleaded gasoline with octane rating of 87 or higher.

In this guide, we walk you through locating the fuel door, handling both traditional gas caps and capless fillers, selecting the right fuel, and practicing safe fueling habits at the pump. Trim level differences can affect the exact release mechanism, so consult your owner’s manual if you’re unsure.

Locating and opening the fuel door

The first step is to find and open the fuel door, which sits on the left rear quarter of the vehicle and may be released from inside the cabin or opened directly from outside depending on trim.

1. Locate the fuel door on the left rear side of the Civic.


2. Release the door using the interior lever near the driver's left knee (if your trim has it) or manually press the door edge from outside to pop it open.


3. Open the door fully to expose the filler neck.

With the door open, you’re prepared to begin fueling. If you have trouble locating the release, check the owner’s manual for your specific trim level.

Opening the filler and fueling

Before you fill, determine whether your Civic uses a traditional gas cap or a capless filler system, as the steps differ slightly.

1. If your Civic has a traditional gas cap, twist the gas cap counterclockwise to remove it and set it aside.


2. If your Civic uses a capless fueling system, there is no cap to remove; simply proceed to insert the nozzle into the filler neck.


3. Insert the gasoline nozzle and select the appropriate fuel at the pump. Begin fueling and stop when the pump automatically clicks off. Do not top off.


4. If you removed a gas cap, reattach it by turning clockwise until you hear a click, then close the fuel door securely.

Capless fueling streamlines the process, but you still should follow pump safety and ensure the filler door is closed after fueling.

Fuel type and safety guidelines

Choose the correct fuel and follow safety practices to protect the vehicle and yourself at the pump.

• Use regular unleaded gasoline with an octane rating of 87 or higher. The owner’s manual confirms 87 octane as the minimum for most Civics; higher octane is optional and generally not necessary for everyday driving, including most turbo models.


• Turn off the engine and avoid smoking or open flames while fueling. Keep the nozzle in contact with the filler neck to prevent spills.


• Do not “top off” the tank after the automatic stop; stop when the pump clicks.


• If you smell fuel, notice a leak, or the check engine light appears after fueling, contact a dealer or mechanic for inspection.

Always secure the filler door and, if applicable, ensure the gas cap is properly tightened to prevent vapor leaks and sensor warnings.

Troubleshooting and tips

If the fuel door won’t open or you can’t remove the cap (in a non-capless model), refer to the owner’s manual for the exact release location for your trim. If the door or release mechanism seems stuck, a Honda dealer can show you the correct method for your vehicle. If you notice any fuel odor or dripping, stop fueling immediately and seek assistance.

Summary

Fueling a 2020 Honda Civic is a straightforward process: locate and open the left-rear fuel door, access the filler neck (cap-based or capless), refuel with 87 octane or higher unleaded gasoline until the pump stops, then reseal the cap if applicable and close the door. Adhere to safety practices at the pump and always consult the owner’s manual for trim-specific instructions.