The 2005 Honda Civic's gasoline-powered models use a 13.2-gallon gas tank (about 50 liters).
For 2005 Civics, Honda offered both sedan and coupe body styles with gasoline engines, and the standard tank capacity is 13.2 gallons across those variants. This capacity provides a practical driving range, though exact mileage per tank varies with driving conditions, engine, and trim level.
Gas-tank capacity by model and configuration
The figures above apply to the common gasoline-powered Civic models from that year—sedan (DX, LX, EX) and coupe. The 13.2-gallon tank is standard for these versions.
Hybrid and other variants
The Civic Hybrid from the same era uses a different fuel-tank size. If you own a Hybrid or are researching one, consult the owner's manual or the label near the fuel door for the precise capacity, since it is not the same as the 13.2 gallons listed for gasoline-only Civics.
Summary
Bottom line: a 2005 Honda Civic's gas tank is 13.2 gallons for gasoline-powered models. Hybrid variants use a different capacity, so verify your specific model if you need exact figures.