FUEL SPECIFICATION
22 4
012/16 Diesel, February 1997
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.
If fuels other than the above classes are considered, the operator must consult Perkins
Engines (Stafford) Limited, and ensure that a suitable grade of lubricating oil is used.
BS2869 REQUIREMENTS FOR ENGINE FUEL
Property Class A1 Class A2
Viscosity, Kinematic at 40°C, cSt *
Min. 1.5 1.5
Max. 5.0 5.5
Cetane number, min. 50 45
Carbon residue, Ramsbottom on 10% residue, % (m/m), max. 0.20 0.20
Distillation, recovery at 350°C, % (V/V), min. 56°C 56°C
Sulphur content, % (V/V), max. 0.05 0.05
Sediment, % (m/m), max. 0.01 0.01
Ash, %(m/m), max. 0.01 0.01
Sulphur content, % (m/m), max. 0.30++ 0.50++
Copper corrosion test, max. 1 1
Cold filter plugging point C, max.
Summer (March/September inclusive) -4 -4
Winter (October/February inclusive) -15 -12
* cSt = 1 mm
²
/s.
++ 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. (See
page 20 "Engine Operation").
E
NGINE 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.
