7-MAINTENANCE
Engineoilviscosity
Asageneralrule,multigradeoilsmustbeused.Inclosed
roomsheatedtotemperatures>5°C(41°F),itisalso
possibletousesingle-gradeoils.Astheviscosityoflubri-
catingoilsvariesaccordingtothetemperature,thetem-
peratureoftheplacewheretheenginewillbeusedisde-
cisiveforchoosingtheoilviscositygrade(SAEgrade).
Accordingtothediagramreportedheretotheside,itis
possibletochoosethenecessaryoilviscosityforeach
temperatureinordertoguaranteeanoptimumoperation
oftheengine.
Ifacertainoiltypeisusedtotemperatureslowerthan
thoseindicatedinthediagram,itcouldnegativelyaffect
thestartingcapacityoftheengine,butwithoutdamaging
theengineitself.
Theuseofacertaintypeofoilattemperaturesabove
thoseindicatedinthediagrammustbelimitedasmuchas
possible,inordertominimizethepossibleweardamage
causedtotheengine.
Syntheticoilsprovideabetterperformancebecauseof
theirbetterstabilityasregardstemperatureandoxidation.
LEEN11T0416BA1
7-8
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