Vetus M4.55 Operation Manual page 87

9 Operating media
C
aution
Do not mix oil of different brands together.
Oils of different brands are mostly not com-
patible with each other. If they are mixed,
the mixtures can cause components such
as piston rings, cylinders etc. to seize up
and cause wear to moving parts. The best
thing is to keep to one brand and one
type of lubricating oil for each subsequent
service.
limits concerning motor oil
Characteristic
Viscosity
Total base numberl (HCl)
Total acid number
Water content
Flash point
Pentane insolubles
Coagulated pentane insolubles
limits concerning motor oil
If an analysis of the used lubricating oil is
conducted to determine its condition, con-
sult the overview below. Change the oil if
one or more of the conditions is not met.
Unit
cSt @ 100°C
mgKOH/g
mgKOH/g
% volume
°C
% weigth
% weight
• How often the oil has to be changed
depends on the characteristics of the
fuel. Only use the recommended fuels.
• The limit for the total base number is
half of that of new oil in the case of an
analysis method based on perchloric
acid.
Test method
JIS: K 2283
JIS: K 2501
+3.0 max. for new oil
JIS: K 2275
JIS: K 2265
ASTM: D 893
lubricating oil
n
ote
limit
+30% / -15%
max. for new oil
2.0 min.
0.2 max.
180 min.
0.5 max.
3.0 max.
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