Honda Civic 2021 Owner's Manual page 27

Refueling
(P 505)
Fuel recommendation: Unleaded gasoline, pump octane number 87 or higher
Fuel tank capacity:
a
Unlock the driver's
door.
2 Locking/Unlocking
the Doors from
the Inside
(P138)
b
Press on the edge of
the fuel fill door to
make it pop up
slightly.
c
After refueling, wait
for about five
seconds before
removing the filler
nozzle.
26
12.39 US gal (46.9 L)
Wait for five seconds