Engine
SHOP MANUAL
Ch 1 page 87
Oil analysis
Oil analysis may be necessary to determine a different oil
change interval from that recommended here.
Oil companies can offer analysis of the engine oil.
Such analysis measures the oil’s TBN (Total Base Number),
TAN (Total Acid Number), fuel dilution, water content, viscosity
and the quantity of particles and soot in the oil.
The result of a series of analyses is used as the basis for
establishing a suitable oil change interval.
If the conditions are changed, a new oil analysis programme
must be carried out to establish new change intervals.
Checking oil level
Leave the engine off for at least 1 minute before checking the
oil level.
NOTE
1. Remove oil dipstick (1 LHS of engine) and check the oil level. The
correct level is between the minimum and maximum marks on the oil
dipstick.
2. Top up with oil when the oil level is at or below the minimum mark.
On older models the oil filling point is
on the top of engine. (Figure 166)
Checking the Oil Level with the Engine Switched Off
1
2
Figure 167
Figure 166
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