Polaris 2005 RMK - Manual (Page 57)

54
OPERATION
Fuel
Premium Fuel Switch
If you’re uncertain about the quality or octane rating of the fuel you
use, turn your key switch to ON/REG. The Premium Fuel light will go
out. This setting will adjust the timing of your engine to run on fuels
with 87 octane or higher. Polaris does not recommend using fuel with
lower than 87 octane. Running your machine on ON/REG will help
protect your engine from damage caused by low octane fuels.
Fuel Reserve Capacity (Mechanical Gauge)
There are approximately two gallons of fuel left in the tank when the
mechanical fuel gauge reads RES.
Fuel System Deicers
If you use non-oxygenated fuel, Polaris recommends the regular use of
isopropyl-based fuel system deicer. Add one to two ounces per gallon
(8-16 milliliters per liter) of gasoline to prevent engine damage
resulting from fuel system icing and lean fuel mixtures. Never use
deicers or additives containing methanol. See page 112 for the part
numbers of Polaris products.
If you use oxygenated fuel containing ethanol, additional alcohol
deicers or water absorbing additives are not required and should not be
used.
CAUTION
Prolonged exposure to petroleum based products may damage
paint. Always protect painted surfaces when handling fuel.