Porsche 928 1982 Owner's Manual page 66

Gasohol
A mixture of unleaded gasoline and ethanol
(ethyl alcohol) known as "Gasohol" is avail-
able in gas stations in some areas.
Porsche vehicles are designed and certified
to use gasoline as specified under "Fuel Re-
commendation". You may decide to use
Gasohol in your Porsche, provided it contains
not more than 10 % ethanol and the octane
requirements for your car are met.
However, we strongly recommend to switch
back to gasoline without ethanol, if you expe-
rience the following adverse effects on your
vehicle because of the use of gasohol.
- Deterioration of drivability and performance
- Substantially reduced fuel economy
- Generation of vapor lock and hot start prob-
lems, especially at high altitude or at high
temperatures
- Engine malfunction or stalling.
The continued use of gasohol under these
conditions may adversely affect the fuel and
emission control systems of your vehicle.
64
Fuel Economy
Fuel economy will vary depending on where,
when and how you drive, optional equip-
ment installed, and the general condition of
your car. A car tuned to specifications and
correctly maintained, will help you get maxi-
mum fuel economy.
- Keep a light foot on the gas pedal.
- Drive smoothly, avoid quick acceleration,
sudden changes in speed and abrupt
stops.
- Avoid unnecessary idling. Turn the engine
off.
- Do not carry unnecessary weight.
- Use air conditioner only when needed.
- W h e e l s should be aligned and tires in-
flated at correct pressures.
For good fuel economy we recommend smooth
and even acceleration. Very fast, racy driving,
alternating between full throttle and hard brak-
ing, raises the fuel consumption considerably.
Also, tires and brake linings wear faster. It is
more economical to drive smoothly and at fair-
ly constant speed.
Please observe all local and national speed
limits.