Honda Pioneer SXS500M 2019 Owner's Manual page 33

Fuel gauge
The fuel gauge shows the approximate fuel supply available in a
graduated display with the fuel symbol. When the segment F goes
on, the fuel tank capacity is:
4.07 US gal (15.4 ℓ)
fuel symbol
Regardless of what mode the display is in, when the fuel level
reaches only one segment remaining, the display will automatically
switch to the fuel gauge display. You should refuel as soon as
possible.
The amount of fuel left in the tank with the vehicle on a firm, level
surface is approximately:
1.11 US gal (4.2 ℓ)
The fuel gauge and LO FUEL message will begin to flash alternately
when the fuel level decreases further.
Indicators & Displays
fuel gauge
fuel gauge
LO FUEL message
Instruments & Controls
segment F
23