Subaru WRX & WRX STI Manuals 2013 Impreza WRX & WRX STI Owner's Manual | Page 351

Maintenance and service

Windshield washer fluid

Washer fluid level gauge

11-31

level gauge or the “FULL” mark on the
tank.
Use windshield washer fluid. If windshield
washer fluid is unavailable use clean
water.
In areas where water freezes in winter,
use an anti-freeze type windshield washer
fluid. SUBARU Windshield Washer Fluid
contains 58.5% methyl alcohol and 41.5%
surfactant, by volume. Its freezing temperature varies according to how much it
is diluted, as indicated in the following
table.
Washer Fluid
Concentration

Freezing
Temperature

30%

10.48F (−128C)

50%

−48F (−208C)

100%

If you spray washer fluid on the windshield
but the supply of washer fluid appears to
diminish, check the level of washer fluid in
the tank.

−498F (−458C)

CAUTION
Never use engine coolant as washer
fluid because it could cause paint
damage.
Remove the washer tank filler cap, then
check the fluid level indicated by the level
gauge (attached to the inside of the cap).
If the level is near the “Low” mark, add
fluid until it reaches the “Hi” level on the

In order to prevent freezing of washer
fluid, check the freezing temperatures in
the table above when adjusting the fluid
concentration to the outside temperature.
If you fill the reservoir tank with a fluid with
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