Porsche 928S 1983 Driver Manual page 68

Container for concentrated
wash system
The fluid reservoir is mounted at the right on
the front bonnet lock cross member and holds
approx. 0.6 liters of cleaning fluid. To avoid
damage to the paintwork, only "Porsche spe-
cial silicone remover" should be used. Other
cleaning agents are not suitable for the con-
centrated washer system, but if this special
solution is not obtainable, a proprietory solu-
tion can be used, following the manufacturers
recommendations for mixing quantities. "Por-
sche special silicone remover" is proof against
frost down to - 2 5 ° C.
66
Fuel tank
The fuel tank filter is set in the rear quarter
panel behind the right hand rear wheel.
An extra area is built in to stop the fuel from
overflowing when it warms up. This area
should not be filled when filling up with fuel.
After filling up, the filler cap should be screw-
ed on until it is felt to be fully home.
When refuelling, the engine should always
be turned off.
The fuel tank holds approx. 86 liters (19
galls.). When the central warning light and
the fuel tank warning light in the instrument
console come on, you should refill the tank.
You have only about 8 liters (7 Imp. qts.) fuel
left.
Fuel
Your Porsche will run on any grade of fuel
with an octane rating of 98 or higher.
To prevent ignition knock (pinging) when driv-
ing in countries with low-octane fuel, you
should accelerate gently, change speeds in
good time and avoid driving at top engine
speeds. If you intend to stay in one of these
countries for some time, you should consult
your Porsche dealer regarding adjustment of
the ignition timing.