GMC VE UTE Series Owner's Handbook Manual page 251

7-11
Chapter 7
WEEKLY CHECKS
undER BonnET CHECkS cont.
Measuring oil consumption
A simple consumption test can be performed if the driver is concerned by an apparent
drop in the oil level.
Add sufficient oil to bring the level up to the UPPER mark on the dipstick (avoid
overfilling). Take note of the odometer reading and check the oil periodically. When the
level reaches the ADD mark, carefully measure the amount of oil required to return the
level back to UPPER mark and note the odometer reading. The amount of oil added
for the kilometres travelled over the duration of the test indicates the oil economy of
the engine. Remember to check the oil level at the start and finish of the test on level
ground and allow time for oil to drain down (approximately 10 minutes after engine is
switched off). Avoid minor top ups (0.25 to 0.5 litre) when measuring oil consumption,
as inaccuracies of oil quantity added, may cloud the result.
If, after taking into account the above factors, you are still concerned that your engine
has excessive oil consumption then consult your Holden Dealer. Remember that an
engine's oil consumption should not be judged until it has run at least 10,000 km.