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6.2 Fuels and lubricants
Quality
The oil is an essential factor for the performance and lifetime of the
engine.
Use engine oil for four-stroke engines which meets or even
exceeds the requirements for API-service class SJ or higher (or
equivalent).
Viscosity
Since lubrication oil changes its viscosity with the temperature, the
ambient temperature at the operating location of the engine is of
utmost importance when choosing the viscosity class (SAE-class)
SAE10W-30 or 5W-30 is recommended for general use under any
temperature.
For starting/operating temperatures between 14 °F (-10 °C) and
-13 °F (-25 °C) you should use a fully synthetic oil 5W-30.
When using single purpose oil you must choose the correct vis-
cosity for the average temperature in the area of use.
Change intervals
The longest permissible time the lubrication oil should remain in an
engine is 1/2 year or 100 operating hours.
Quality
The engine has been approved for operation with unleaded gaso-
line with a octane number of 91 or higher (or Pump Octane
Number" 86 or higher).
Use only commercially available brand fuel.
You can use unleaded standard grade petrol with maximum 10 per-
cent by volume of ethanol (E10) or maximum 5 percent by volume
of methanol.
Methanol must also contain co-solvents and corrosion inhibitors.
Using fuels with higher ethanol or methanol contents exceeding the
values specified above may cause starting difficulties and/or per-
formance problems. Damage may also occur to metal, rubber or
plastic parts in the fuel system.
Engine damage and performance problems caused by the use of
fuels with higher ethanol or methanol percentages than the ones
specified above are not covered under warranty.
The hydraulic system is operated with hydraulic oil HV 46 (ISO)
with a kinematic viscosity of 46 cSt (46 mm
2
/s) at 104 °F (40 °C)
and 8 cSt (8 mm
2
/s) at 212 °F (100 °C). For topping up or for oil
changes use only high-quality hydraulic oil, type HVLP according
to DIN 51524, part 3, or hydraulic oils type HV according to ISO
6743/3. The viscosity index (VI) should be at least 150 (observe
information of manufacturer).
Engine oil
Fig. 69
Fuel
Mineral oil based hydraulic oil
Maintenance – Fuels and lubricants
BW 900-50
58
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