°C
-30 -20 -10 0 10 20 30 40
___ ••• ' 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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