CITROEN C5 Handbook page 23

ALL TYPES
S.A.E. Norms - Table for selection of engine oil grade
Selection of engine oil grades recommended for climatic conditions in countries of distribution
ACEA 2003 norms
The meaning of the first letter has not changed, it still corresponds to
the type of engine :
A : petrol and dual fuel petrol / LPG engines.
B : diesel engines.
The figure following the first letter corresponds to the type of oil: .
3 : high performance oils.
4 : oils specifically for direct injection diesel engines.
5 : very high performance oils permitting lower fuel consumption
Example :
ACEA A3 : high performance oils specifically for petrol and dual fuel
petrol / LPG engines
ACEA A/B : blended oils giving very high performance for all engines,
also permitting better fuel economy, specifically for direct injection die-
sel engines
NOTE : From 01/01/2003 there is no longer any reference to the year
of creation of the norm, (Example : ACEA A3/B3 98 becomes ACEA
A3/B3.
LUBRICANTS - TOTAL recommended oils
Evolution of the norms as at 01/01/2003
API norms
The meaning of the first letter has not changed, it still corresponds to
the type of engine :
S : petrol and dual fuel petrol / LPG engines.
C : diesel engines.
The second letter corresponds to the degree of evolution of the oil
(ascending order).
Example : Norm SL is more severe than norm SJ, corresponding to
a higher level of performance.
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