113
Driving and operation
Overrun
z
The fuel supply is automatically shut off
during ov errun, e.g. when the vehicle is
being driven down long gradients or
when braking – see page 111.
z
To enable the overrun cut-off to take
effect a nd sav e fuel, during overrun do
not ac celera te and do not declutch.
Corr ect gear selec tion
z
High revs increase engine w ear and fuel
consumption.
z
Do not race your engine. Avoid d riv ing at
high engine speeds.
Driv ing with an eye on the tachom eter
saves fuel. If possib le, drive a t low rev s in
each gear and a t a consta nt speed.
Driv e in top g ear as m uch a s p ossible,
shift up as soon as possib le and do not
shift down until the engine is no longer
running truly.
High speed
z
The faster the sp eed, the higher the fuel
consump tion and the noise level. Driv ing
at full throttle uses up a great deal of fuel
and g enerates excessive noise and high
emission levels.
z
Slightly relea sing the accelerator ped al
results in distinct fuel savings with no
major loss of speed.
Drive at no more tha n around three
quarters of maximum speed and you will
use up to 50% less fuel, without losing a
great deal of time.
Tyre pressure
z
Inadequate tyre p ressure, leading to
higher road resistance, costs m oney in
two wa ys: more fuel and increa sed tyre
wear.
z
Regular checks (every 14 d ays) pay off.
Electrical loa ds
z
The power consum ption of electrical
equip ment increa ses fuel consumption.
z
Sw itch off ad ditional c onsumers (e.g.
air conditioning, heated rear window)
when they are no longer required.
Repair and m aintenance
z
Improper repairs or adjustm ent and
maintenance work can increase fuel
consumption. Do not carry out w ork on
the eng ine yourself.
You ma y infring e environmental la ws out
of ignorance by not d isposing of
materials properly.
Appropriate parts might not b e recycled.
Contact with some of the materia ls
inv olv ed may p ose a hea lth haz ard.
z
We recom mend that repair and
maintenance be entrusted to your Opel
Serv ice Partner.
Extr em e d riving conditions
z
Driv ing up steep gradients, cornering,
driving on poor roads and winter driving
all increase fuel consumption.
Fuel consumption increa ses dramatically
in urba n tra ffic a nd at winter
temperatures, especially on short trip s
when the engine operating tempera ture
is not reached.
z
Follow the hints given above to keep
consumption to a m inimum under suc h
cond itions.
Summary of Contents for 1973 GT
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