Break-In Period; Gear Selector Lever; Manual Transmission - Saab 1992 900 Owner's Manual

52 Starting and driving
octane fuel (minimum: 87 octane AON)
quite safely. The same performance as that
achieved with 93 octane fuel can also be
achieved for short bursts. In general, a
high-octane fuel will give the best perfor­
mance and a low-octane fuel the best fuel
economy.
The APC system adjusts the boost supplied
by the turbo to suit the knocking/pinging
tendencies of the engine. Brief spells of
knocking in the engine are perfectly normal.
These can occur when a heavy load is put
on the engine at about 3,000 r/min and the
extent of the knocking will depend on the
grade of fuel being used.
Isolated instances of knocking are more
likely when low-octane fuel is being used.
This controlled form of knocking followed by
a reduction in the charging pressure merely
indicates that the APC system is working
normally, and is perfectly safe for the en­
gine.
However, if constant knocking occurs every
time a load is put on the engine, this indi­
cates a malfunction in the system.
Break-in period
Pistons, cylinder walls and bearings need
time to bed in, to obtain uniform, wear­
resistant surfaces. If a new engine is driven
too hard, this gradual process of wearing in
will not be possible and the life of the car,
and engine in particular, will be shortened.
During the first 1,200 miles (2,000 km) do
not exceed 5,000 rpm. During the first
1,800 miles (3,000 km) never drive the car
at full throttle other than momentarily.
Break-in period for new brake
pads
The break-in period for new brake linings is
around 90 miles (150 km) of city driVing or
300 miles (500 km) of highway motoring. To
extend the service life, avoid hard braking
during this period.
Gear selector lever
Manual Transmission
The gear positions are shown on the gear
lever knob. Fifth gear is the highway gear
in which best fuel economy can be
achieved. To engage reverse (R), first raise
the collar on the gear lever.
CAUTION!
Reverse gear is not synchronized.
En~'
gage reyerse only when the vehjcle i.$.
completely stopped and only with the
clutch pedal fully depressed and the ac­
c.elerator fully released. When parking,
apply the hand brake after engaging re­
verse gear.
Gear shift pattern and reverse collar
SG 866