°C
-30
-20
-10
0
10
20
30
40
___
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I
,
,
,
'_
•••• __
---
°
I
I
I
I
I
I
I
F
-20
0
20
40
60
80
100
ENGINE OIL
API classifications of engine oil
The American Petroleum Institute classifies
engine oils according to their performance
(quality). Each category is given two letters.
The first letter indicates the field of applica-
tion.
S= Service.
API
categories valid primarily
for fuel engines.
C= Commercial.
API
categories valid prima-
rily for diesel engines.
The second letter indicates the quality in
ascending alphabetical order.
API-SG=Oil
for fuel engine
API-CD=Oil for diesel engine
A higher quality than specified
may al-
ways be used.
Oils which fall into both classifications
are
designated
accordingly
e.g. API SG/CC.
Further specifications
from the motor in-
dustry may also be found on the oil cans
Engine
The viscosity
should
be selected
according
to outside
temperature. Do not switch to a different viscosity
in the
event of brief temperature fluctuations.
A
B
c
A= Single-grade oil
B= Multi-grade oil
c= Improved-lubricity oil
CCMC classifications
of engine oil
CCMC stands for Comite des Constuc-
teurs d'automobiles
du Marche Commun
(Committee
of Automobile
Manufac-
turers in the European
Community).
The CCMC system
is based on the
API
classifications
but takes into account the
special
lubrication
requirements
of the
engines of European vehicles.
Engine oil SAE 5W-30 to be used in the case of long-lasting temperatures
below
-20°C(-4°F).
10-4
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