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Measuring oil consumption
Oil consumption for a combustion engine refers to the amount of
oil consumbed as a result of the combustion process. Oil
consumption is not to be equated with oil loss resulting from leaks
from components such as the oil pan and cylinder head cover.
The role of engine oil is to:
| 1. |
separate surfaces that slide against each other by
means of an oil film, i.e. to prevent dry friction |
| 2. |
dissipate heat generated by friction |
| 3. |
lead away combustion residue |
This task involves the consumption of a certain amount of oil.
It is therefore wrong to assume that future enhancements of the
combustion engine may produce an engine which has zero oil
consumption.
Outside operating conditions, driving style and manufacturing
tolerances do, however, have an impact on oil consumption.
It is imperative that oil be filled when the level has fallen
below the "MIN" mark on the dipstick.
It is also important to ensure that the oil level is not above
the "MAX" mark on the dipstick as this could result in increased
oil consumption.
As oil consumption is affected by technical factors, the
conclusion is reached that the engine does not consume oil in
special operating conditions that lead to oil dilution.
During conditions such as frequent cold starts and driving
before the engine reaches operating temperature, it is only the oil
flowing back to the oil pan that carries away scalding fuel
components and precipitates. This "dilutes" the oil and leads to
the erroneous assumption that the engine consumes no oil.
Such diluted oil loses its ability to lubricate and could cause
engine damage if the prescribed oil change intervals are not
observed.
Driving in predominately urban traffic and frequently running a
cold engine at rpms above idle speed are the main causes of oil
dilution.
As oil consumption does not stabilise until after a few thousand
kilometers of travel, oil consumption measurements are not reliable
until after a distance of about 7,500 km.
Before measuring consumption, ensure that the engine is not
losing oil due to leakage.
The oil standard is merely used for monitoring and cannot be
used for measurement purposes. In principle, the engine must have
stopped for at least 5 miniutes or 10 minutes in the case of the
Movano and Vivaro (15 minutes with F9Q engines) before checking the
oil level. If the maiximum amount of oil added during an oil change
does not agree with the max. on the oil dip stick, then this will
be accounted for by the necessary manufacturing tolerances.
All information on permissible engine oil consumption and
capacities are found in the Owner's Manual.
| 1. |
The check is carried out with the vehicle parked on
a level surface with the engine at operating temperature (engine
oil temperature at least 80 °C). |
| 2. |
Drain the engine oil immediately after switching
off the engine - drainage time = approx. 30 minutes (this value has
been obtain through technical trials). |
| 3. |
The quantity of drained engine oil is determined
via a measuring container 1) . The container is then filled with fresh
oil up to the maximum engine oil capacity minus the volume
remaining in the unchanged oil filter. |
| 4. |
With this engine oil quantity, the customer should
be able to travel at 1000 km without needing to top up engine oil
(the distance profile and customer driving style should be
maintained). |
| 5. |
Then, the preceding procedure (points 1 and 2)
should be repeated with the exact same engine drainage time. |
| 6. |
The oil quantity now "missing" from the measuring
container is equal to the engine oil consumption for that
distance. |
| 7. |
Oil consumption is calculated as follows: |
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filled oil quantity (l) – drained oil quantity (l)
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x 1000 = oil consumption (l/1000 km)
|
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total distance driven (km)
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Capacity and measuring container gradation
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6 litres
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7.5 litres
|
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Agila
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Z 10 XE, Z 10 XEP, Z 12 XE, Z 12 XEP, Z 13 DT
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|
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Corsa-C / Combo-C
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Z 10 XE, Z 10 XEP, Z 12 XE, Z 12 XEP, Z 14 XE, Z 14 XEP, Z 16
SE, Z 16 YNG, Z 18 XE, Y 13 DT, Y 17 DT, Y 17 DTL, Z 13 DT, 13 DTJ,
Z 17 DTH
|
|
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Corsa-D
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Z 10 XEP, Z 12 XEP, Z 14 XEP, Z 16 LER, Z 16 LEL, A 10 XEP, A 12
XEL, A 12 XER, A 14 XEL, A 14 XER, A 16 LER, A 16 LEL, Z 13 DTJ, Z
13 DTH, Z 13 DTE, Z 17 DTR, A 13 DTC, A 13 DTR, A 13 DTE, A
17DTS
|
|
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Tigra-B
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Z 14 XEP, Z 18 XE, Z 13 DT
|
|
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Meriva
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Z 14 XEP, Z 16 SE, Z 16 XE, Z 16 XEP, Z 16 LET, Z 18 XE, Y 17
DT, Z 13 DT, Z 13 DTJ, Z 17 DT, Z 17 DTH, Z 17 DTR
|
|
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Astra-G
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C 16 SEL, X 12 XE, X 14 XE, X 16 SZR, X 16 XEL, X 18 XE1, X 20
XEV, X 20 XER, Z 12 XE, Z 14XE, Z 14 XEP, Z 16 SE, Z 16 XE, Z 16
XEP, Z 16 YNG, Z 18 XE, Z 18 XEL, Z 20 LET, Z 22 SE, X 17 DTL, X 20
DTL, Y 17 DT, Y 20 DTH, Y 20 DTL, Y 22 DTR, Z 17 DTL
|
|
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Astra-H
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Z 12 XEP, Z 14 XEL, Z 14 XEP, Z 16 XEP, Z 16 XE1, Z 16 XER, Z 16
LET, Z 18 XE, Z 18 XER, Z 20 LEH, Z 20 LEL, Z 20 LER, Z 22 YH, A 16
XER, A 16 LET, A 18 XER, Z 13 DTH, Z 17 DTL, Z 17 DTH, Z 17 DTJ, Z
17 DTR, Z 19 DTL, Z 19 DT, Z 19 DTJ, Z 19 DTH, A 17 DTR, A 17
DTJ
|
|
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Zafira
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X 16 XEL, X 18 XE1, X 20 DTL, Z 16 XE, Z 16 YNG, Z 18 XE, Z 20
LET, Z 22 SE, Y 20 DTH, Y 22 DTR
|
|
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Zafira-B
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Z 16 XEP, Z 16 XE1, Z 16 XER, Z 16 YNG, Z 16 XNT, Z 18 XER, Z 20
LEH, Z 20 LER, Z 22 YH, A 16 XER, A 16 XNT, A 18 XER, Z 17 DTJ, Z
19 DTL, Z 19 DT, Z 19 DTH, A 17 DTJ, A 17 DTR
|
|
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Vectra-C / Signum
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Z 16 XE, Z 16 XEP, Z 18 XE, Z 18 XEL, Z 18 XER, Z 20 NET, Z 22
SE, Z 22 YH, Z 28 NEL, Z 28 NET, Z 32 SE, Y 20 DTH, Y 22 DTR, Z 19
DTL, Z 19 DT, Z 19 DTH
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Y 30 DT; Z 30 DT
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Omega-B
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20 SE, X 20 SE, X 20 XEV, Y 22 XE, Z 22 XE, X 25 XE, Y 26 SE, X
30 XE, Y 32 SE, X 20 DTH, X 25 DT, Y 22 DTH, Y 25 DT
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Movano
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S8U 772, S9W 700, S9W 702, F9Q 770, F9Q 772, F9Q 774, ZD3 200,
ZD3 202
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G9T 720, G9T 722, G9U 720, G9U 724, G9T 750, G9U 750, G9U 754,
G9U 632, G9U 650
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Vivaro
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F4R 720, F4R 820, F9Q 760, F9Q 762, G9U 630, M9R 630, M9R 780
M9R 782, M9R 784, M9R 786, M9R 788
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G9U 730
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1 ) See table below.
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