4.2 Lubrication System
See the service schedules section for oil change and oil filter replacement intervals. See the service views section for the oil
drain, oil dipstick, oil fill, and oil filter locations.
4.2.1 Low Oil Pressure Shutdown
The low oil pressure (LOP) shutdown feature protects the engine against internal damage if the oil pressure drops below a
minimum pressure because of oil pump failure or other malfunction.
Note:
The LOP shutdown feature does not protect against damage caused by operating when the oil level is low; it is not a low oil level
shutdown. Check the oil level regularly, and add oil as needed.
4.2.2 Oil Check
The generator set is shipped with Kohler PRO 10W-50 oil. Before operating the generator set, check the engine oil in the
crankcase. See Figure 39.
Maintain the oil level at or near, not over, the full mark on the dipstick. Add Kohler PRO 10W-50 synthetic oil when the oil level
is low. Do not mix conventional and synthetic oils.
Check the oil level before each use. For extended operation, check the oil level every 8 hours (24 hours if the oil makeup kit is
installed). Do not check the oil level when the generator set is running. Shut down the generator set and wait several minutes
before checking the oil.
Figure 39 Oil Check (typical)
4.2.3 Engine Oil Recommendation
Use 5W-30 or Kohler PRO 10W-50 API (American Petroleum Institute) Service Class SG, SH, or SJ synthetic oil. Synthetic oil
oxidizes and thickens less than other oils and leaves the engine intake valves and pistons cleaner.
Note:
Units built in 2022 or later are factory-supplied with Kohler PRO 10W-50 oil. Kohler PRO 10W-50 oil extends the oil change
interval to 300 hours. If conventional oil is used, the oil change interval is reduced to 100 hours. Do not mix conventional and
synthetic oils.
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