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On You R Way - BMW 630CS Owner's Handbook Manual

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40
Fuel consumption, standard test method, economy
On you r way!
For satisfactory operation, the engine
should be supplied with the following
commercially-available fuel for spark-
ignition engines, containing no additives
such as upper-cylinder lubricants:
Super (Premium) petrol (gasoline) to
German lndustrial Standard DIN 51600,
m!nimum oclane number 98 (Research
Method), 88 (Motor Method)
When driving in various foreign coun-
tries, please note that only fuel to the
above standards of quality should be
used.
lf you are obliged to fill up with fuel hav-
ing a lower octane number, and thus with
lower knock resistance, the following
hints will assist in avoiding pre-ignition
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change down in good time, accelerate
gently and carefully. A graph of road
speed/engine speed is shown under
"SPECIFICATONS".
Your car's fuel economy is mainly de-
pendent on your style of driving. Just as
travel by the fa§test trains involves pay-
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gears, violent cornering
and sudden
braking all take their toll, not only in
terms of heavy fuel and oil consumption,
but also more rapid wear of brakes, tires
and other moving parts.
The stamdard te§t method (German ln-
dustrial Standard DIN 70030) for deter-
mining fuel consumption is in no way
identical with the actual average fuel
consumption, which is influenced by a
number of factors such as driving style,
load, road condìtion, traffic density and
flow, weather, tire pressure etc.
The fuel
consumption
expressed
in
terms of road speed] for a vehicle in
standard trim with driver and one pas-
senger, is shown in the section "SPEcl-
FICATIONS".
After drivìng for some time in dense city
traffic or in a queue of cars, we recom-
gìeenath`,8,ttà:gtywoeurre.eB;ià;v:`:Fnkget:edneee£
mile
or
two
at
engìne
speeds
of
4500-5500 rev/min. This will help to dis-
pel any carbon build-up in the cylinders.
lt is bad practice to allow the engine to
warm up at idling speed. Drive away at
moderate engine speeds immediately
after starting. However, if the outside
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increased idle speed for about haJf a
minute, to ensure proper circulation of
the engine oil. Never run a cold engine at
high speeds or its useful working life will
be seriously reduced.
When
declutching,
always
push the
clutch pedal down fully; never drive with
the foot resting on the pedal.
Drivers of cars with automatic transmis-
sion should operate the accelerator and
brake pedal with the right foot only.

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