On vehicle with flexible service interval, the service intervals are calculated, in addition to driven distance and time, also using fuel consumption and oil temperature. This calculation gives a value of the oil's degradation in relation to thermal loading. On vehicles with diesel engines the oil's degradation is calculated based on engine rpm, engine load, driven distance, and oil temperature. This gives values for thermal loading and soot deposits. Oil degradation is the decisive factor for when the next service shall take place.
With this function it is possible to adapt service interval data to fixed oil change interval or flexible oil change interval by changing value for oil quality. Values that can be selected are shown below:
Oil quality 1 = fixed oil change interval
Oil quality 2 = flexible oil change interval
Note:
Vehicles that are to be adapted to flexible service interval must support this function, see service book.
Oil of approved standard must be used when adapting to flexible service interval.
Adaptation may only take place in connection with performed service and reset service indication.
Test conditions:
Ignition on, engine off.
Battery voltage above 12 V.
Procedure:
Select the function.
A dialogue box shows the current value. Press "Yes" to change value.
Enter new value in shown entry field, confirm with "OK".
The entered value is shown, press "Yes" to store the value.
A dialogue box with "stored in memory" is shown.
The function is done.
If the function fails, check the test conditions and repair any faults.