Oil System 61
Oil Change Intervals
The length of time an engine is operated
before an oil change depends on which
quality oil is used, the type of fuel used,
engine oil consumption, vehicle application,
level of dust in the air, etc. The change in-
tervals given in this manual are m
aximum
intervals. If the vehicle is operating in
heavy-duty operation, dusty or off-road
conditions, using high sulfur fuels, etc., ad-
just the intervals down for more frequent
oil changes.
NOTE! Oil filters should always be
changed when changing oil.
Oil Filters
Always change oil filters when changing
the oil. There may be two or three filters on
the engine, one of which is a bypass filter.
This should be changed at the same time as
the regular full-flow filter(s).
CAUTION
Use only the engine manufacturer’s oil
filter for replacement. Use of an oil filter
that does not meet specification could
result in severe damage to bearings,
crankshaft, etc. as a result of unfiltered
oil entering the lubrication system.
W2003480
D12 oil filters
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