Diesel Fuels - Mercedes-Benz 300 CD 1978 Owner's Manual

Diesel Fuels

Use only com m ercially available
vehicular diesel fuels no. 2 or
no. 1 (ASTM d 975 no. 2-d or
no. 1-d).
Change engine oil in com pliance
w ith section "Engine Oil Change
and Oil Filter Service" if diesel fuels
are used whose sulphur content
exceeds 0.5% by w eight. Marine
diesel fuel, heating oil or the like
m ust not be used.
A t very low temperatures the flu id ­
ity o f no. 2-d diesel fuel may be­
come insufficient due to paraffin
separation.
To avoid m alfunctions, no. 2-d
diesel fuel of a lowered cloud point
are marketed during the cold sea­
son.
If w inte r diesel fuel is used, there
w ill hardly be any m alfunctions at
outside temperatures reaching as
low as + 3 ° F ( - 1 6 ° C).
Varying w ith the tem perature, add
a certain quantity of kerosene, if
only no. 2-d summer diesel fuels or
less cold resistant w inte r diesel
fuels are available or if tem pera­
tures drop below + 3 ° F ( — 16° C).
If regular gasoline does have to be
added, its proportion should not
exceed 3 0% . Premium fuels are
not be used.
Engine pow er m ay drop according
to the proportion o f supplem entary
fuel. For this reason, keep percent­
age o f fuel added to the m inim um
necessitated by the am bient te m ­
perature. Even at am bient tem per-
A m bient tem perature
+ 32° F to + 14° F
(0° C to - 1 0 ° C)
+ 14° F to + 5 ° F
( - 1 0 ° C to - 1 5 ° C)
Fuels C oolants Lubricants etc.
atures o f less than —8° F ( —22° C)
the proportion o f supplem entary
fuel (kerosene) m ust not
exceed 50 %.
The fo llo w in g table can be used as
a reference, if it becomes necessary
to add kerosene to no. 2-d diesel
fuel. The m ixing ratios shown
refer to the total m ixture based
on no. 2-d summ er diesel fuel.
W e recommend not to exceed the
m ixture ratio, dependent on pre­
vailing temperatures.
No. 2-d Sum m er Supplem entary
diesel fuel
%
70
50
The adding of supplem entary fuel
to no. 1-d diesel fuel is not recom ­
mended even at low am bient
temperatures.
fuel
%
30
50