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Fuel Requirements
The STEYR MOTORS Marine Engines are designed for maximum fuel economy. To maintain optimum perfor-
mance, use diesel fuel according to CEC RF-03-A-84 or equivalent to meet this specification. When tempera-
tures are below –7 °C (20 °F), use diesel fuels with additives for low temperature operation.
How to Select Fuel
Fuel quality is an important factor in obtaining satisfactory engine performance, long engine life, and acceptable
exhaust emission levels. Direct injected diesel engines are designed to operate with most diesel fuels marketed
today. In general, fuels meeting the properties of CEC RF-03-A-84 have provided satisfactory performance. The
ASTM D 975 specication, however, does not adequately dene the fuel characteristics needed to guarantee the
fuel quality. The properties listed in the following fuel selection chart have provided optimum engine performance.
Fuel Selection Chart
General
Fuel classification
CEC RF-03-A-84
Limit value and units
CEC RF-03-A-80
Limit value and units
ASTM –
Test procedure
Cetane number min. 49 – max. 53 min. 51 – max. 57 D 613 (D 976)
Gravity at 15 °C (kg/l) min. 0.835
max. 0845
min. 0.835
max. 0845
D 1298
Destillation
50 %
90 %
End point
min. 245 °C
min. 320 °C
max. 340 °C
max. 370 °C
min. 245 °C
min. 320 °C
max. 340 °C
max. 370 °C
D 86
Flash point min. 55 °C min. 55 °C D 93
CFPP (Cloud point) max. –5 °C max. –5 °C EN 116 (CEN)
Viscosity Kinematic 40 °C min. 2.5 mm²/s
max. 3.5 mm²/s
min. 2.5 mm²/s
max. 3.5 mm²/s
D 445
Sulfur content min. 0.2 mass-%
max. 0.3 mass-%
min. 0.2 mass-%
max. 0.5 mass-%
D 1266/D 2622
D 2785
Copper corrosion max. 1 max. 1 D 130
Carbon residue
Conradson number
(10 % settling)
max. 0.2 mass-% max. 0.2 mass-% D 189
Ash max. 0.01 mass-% max. 0.01 mass-% D 482
Water content max. 0.05 mass-% max. 0.05 mass-% D 95/D 1744
Acid content (strong acid) max. 0.20 mg KOH/g max. 0.20 mg KOH/g D 974
Oxidation stability max. 2.5 mg/100 ml max. 2.5 mg/100 ml D 2274
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