CITROEN C5 Handbook page 20

LUBRICANTS - TOTAL recommended oils
Selection of engine oil grades recommended for climatic conditions in countries of distribution
ACEA Norms
The first letter corresponds to the type of engine concerned :
A : petrol and dual fuel petrol / LPG engines.
B : diesel engines.
The figure following the first letter corresponds to the type of oil.
1 : highly fluid oils, for reducing friction and lowering fuel
consumption.
3 : high performance oils.
The number after that (96 or 98) corresponds to the year of creation
of the norm.
NOTE : From 01/03/2000, all engine oils must comply with ACEA-
98 norms.
Example :
ACEA A1-98 / B1-98 : Blended oils for all engines, permetting fuel
economy (complying with ACEA 98 norms).
API Norms
The first letter corresponds to the type of fuel used by the engine :
S : petrol and dual fuel petrol / LPG engines.
C : diesel engines.
The second letter corresponds to the degree of evolution, in ascending
order.
Example : The norm SJ is more severe than the norm SH and
corresponds to a higher level of performance.
The adding of the letters EC indicates that the engine oil concerned is
an oil which permits fuel economy.
EC : Energy Conserving, reduction in fuel consumption.
Examples :
API SJ / CF : Blended oils for diesel and dual fuel petrol / LPG
engines API CF / EC : Oils specifically for diesel engines, permitting fuel
economy.
API SJ / CF / EC : Blended oils for all engines, permetting fuel economy.
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ALL TYPES