138n
Engine oil Specified engine oils The quality of the engine oil selected
has critical significance for the opera-
tion and service life of an engine. Based
on extensive testing, BMW recom-
mends only certain types of engine oil.
Use only approved "BMW High Perfor-
mance Synthetic Oil."
If you are unable to obtain "BMW High
Performance Synthetic Oil," you can
add small amounts of synthetic oil in
between oil changes. Use only oils with
the API SH specification or higher.
Ask your authorized BMW center
for details concerning the specific
"BMW High Performance Synthetic Oil"
or "synthetic oils" which have been ap-
proved.<
You can also call BMW of North Amer-
ica at 1-800-831-1117 or visit this web-
site: www.bmwusa.com to obtain this
information.
Viscosity ratings Viscosity is the oil flow rating as estab-
lished in SAE classes.
The selection of the correct SAE class
depends on the climatic conditions in
the area where you typically drive your
BMW.
Approved oils are in SAE classes
5W-40 and 5W-30.<
These oils may be used for driving in all
ambient temperatures.
530us050
144n
Caring for your vehicle Exterior finish To provide effective corrosion protec-
tion, multilayer paintwork is applied at
the factory. Cataphoretic immersion
priming techniques are supplemented
using special body-cavity protectants,
with the application of specially-devel-
oped and extensively tested materials.
A layer of flexible PVC is first applied to
the undercarriage. Following this, a
comprehensive undercoating treat-
ment with a wax-based protectant is
applied.
Regular maintenance makes an impor-
tant contribution to maintaining the
safety and value of your vehicle.
Increasing awareness of the effects of
harmful environmental factors on vehi-
cle finishes have led paint and vehicle
manufacturers to initiate ongoing pro-
grams designed to further improve the
durability of their finishes. Despite this,
environmental factors that occur locally
or regionally can have negative effects
on the finish of your vehicle. These
should guide you in determining the fre-
quency and extent of your efforts to
maintain the vehicle finish. Depending upon material and type
of impact (perforation of paint layer),
physical stresses from sand, road salt,
gravel, etc., can cause corrosion to
start extending beneath the finish, start-
ing at the point of impact.
Road dirt, tar spots, dead insects, ani-
mal droppings (strong alkali effect) and
tree excretions (resins and pollen) all
contain substances capable of causing
damage when allowed to remain on the
finish of your vehicle for any period of
time (spots, etching, flaking, separation
in the top coat).
In industrial areas, deposits from fly
ash, lime, oil deposits, sulfur-dioxide in
precipitation (acid rain) and other envi-
ronmental pollutants will all damage the
surface of the vehicle unless adequate
protection is provided. In coastal regions, high levels of atmo-
spheric salt and humidity promote cor-
rosion.
In tropical zones, temperatures of over
105 7 (40 6) in the shade prevail, in
addition to heavy ultraviolet radiation
and high humidity. Under those condi-
tions, light paints can reach tempera-
tures up to 175 7 (80 6) and dark
paints up to 250 7 (120 6).
