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Oil Recommendations
Using the proper type and weight of oil in the
crankcase is extremely important. So is checking oil
daily and changing oil regularly. Failure to use the
correct oil, or using dirty oil, causes premature engine
wear and failure.
Oil Type
Use high-quality detergent oil of API (American
Petroleum Institute) service class SG, SH, SJ, or
higher. Select the viscosity based on the air
temperature at the time of operation as shown in the
following table.
**
*
*Use of synthetic oil having 5W-20 or 5W-30 rating is
acceptable, up to 4°C (40°F).
**Synthetic oils will provide better starting in
extreme cold below -23°C (-10°F).
NOTE: Using other than service class SG, SH, SJ,
or higher oil or extending oil change
intervals longer than recommended can
cause engine damage.
NOTE: Synthetic oils meeting the listed
classifications may be used with oil
changes performed at the recommended
intervals. However to allow piston rings
to properly seat, a new or rebuilt engine
should be operated for at least 50 hours
using standard petroleum based oil
before switching to synthetic oil.
A logo or symbol on oil containers identifies the API
service class and SAE viscosity grade.
Section 6
Lubrication System
Figure 6-1. Oil Container Logo.
Check Oil Level
1. Make sure the engine is stopped, level, and is cool
so the oil has had time to drain into the sump.
2. To keep dirt, grass clippings, etc., out of the
engine, clean the area around the oil fill cap/
dipstick before removing it.
3. Remove the oil fill cap/dipstick; wipe oil off.
For engines with a press-on style dipstick:
Reinsert the dipstick into the tube and press onto
the tube See Figure 6-2 (A).
For engines with a thread-on style dipstick:
Reinsert the dipstick into the tube and rest the oil
fill cap on the tube. Do not thread the cap onto
the tube. See Figure 6-2 (B).
A
Figure 6-2. Checking Oil Level.
Section 6
Lubrication System
B
6
6.1
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