User’s Handbook, TSL 4186E, Issue 2 57
5
4012/16 Diesel
Engine fluids 5
Fuel specification
To get the correct power and performance from your engine, use good quality fuel.
Fuel should be wholly hydrocarbon oil derived from petroleum, with which small quantities of additives may be
incorporated for the improvement of ignition or other characteristics and should conform to British Standard
Specification 2869. Class A1 or A2, as detailed in the table below.
Note: If fuels other than the above classes are considered, the operator must consult Perkins Engines
Company Limited, Stafford, and ensure that a suitable grade of lubricating oil is used.
BS2869 requirements for engine fuel
(1) 1cSt = 1 mm
2
/s.
(2) Applies to Northern Hemisphere only.
(3) This limit is set in accordance with the legislative requirements for gas oil of the 'Council Directive (75/716/EEC of the European
Economic Community) on the approximation of the laws of Member States relating to the sulphur content of certain liquid fuels'. In
countries where this legislation does not apply, it is permissible to run 4000 series engines on fuels with up to 1.0% sulphur.
Engine fuels
1 The two classes of fuel specified in the table are marketed specifically as oil engine fuels. Class A1 is of
higher quality and is intended primarily as an automotive diesel fuel, whilst Class A2 is intended as a general
purpose diesel fuel. Classes A1 and A2 are distillate grades and are so specified as to prevent the inclusion
of residuum.
2 The specifications for Classes A1 and A2 include limits for cold filter plugging point chosen to cover seasonal
requirements in the United Kingdom.
3 Ignition quality is specified in terms of cetane number, but the calculated cetane index is referred to as an
alternative for routine purposes with fuels not containing ignition improver additives.
Note: If local supply problems dictate that fuels which fall outside the above specification are to be used, our
Service Department must be consulted prior to use.
Property Class A1 Class A2
Viscosity, kinematic at 40 °C, cSt
(1)
Minimum 1,5 1,5
Maximum 5,0 5,5
Cetane number, min. 50 45
Carbon residue, Ramsbottom on 10% residue, % (m/m), maximum 0,20 0,20
Distillation, recovery at 350 °C, % (V/V), min. 56 °C 56 °C
Water content, % (V/V), maximum. 0.05 0.05
Sediment, % (m/m), maximum. 0.01 0.01
Ash, % (m/m), maximum. 0.01 0.01
Sulphur content, % (m/m), maximum. 0.30
(2)
0.50
(2)
Copper corrosion test, maximum. 1 1
Cold filter plugging point °C, maximum.
Summer (March/September inclusive)
(3)
-4 -4
Winter (October/February inclusive)
(3)
-15 -12
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