Check the engine oil quality.
Check the oil deterioration, entry of water, discoloring of thinning.
If the quality is visibly poor, replace the oil.
Check the engine oil level.
After warming up the engine and then 5 minutes after the engine stop, oil level should be between the "L" and "F" marks in the dipstick.
If low, check for leakage and add oil up to the "F" mark.
Do not fill with engine oil above the "F" mark.
Recommendation
ACEA C2 / 0W-30
Allowed oil grade
ACEA C2 or C3
Recommended long life engine oil : Shell ultra helix AP (C3 / 5W-30), Shell ultra helix AP-L (C2 / 5W-30)
Allowed SAE viscosity
For best performance and maximum protection of all types of operation, select only those lubricants which :
Satisfy the requirement of the ACEA classification.
Have proper SAE grade number for expected ambient temperature range.
Lubricants that do not have both an SAE grade number and ACEA service classification on the container should not be used.
The ACEA certified engine oil is required as a service engine oil. Only in case that ACEA certified engine oil is not available, the API certified engine oil (API CH-4 or above) is allowed restrictively.
For the vehicle equipped with DPF, the service engine oil quality should meet the ACEA C2/C3 grade. However, oil refill with small amount of ACEA B4 grade between oil change intervals is possible.