I have just come from the mechanic where I asked to change the oli (including oil filter) with Selenia 5W-40 and to insert 6.4 litres - as recommended by Alfa.
When I received the car and drive home, just for confirmation I check the oil level and the level was way higher than the max mark.
I went to the mechanic and complained and, together with me, he removed the oil plug and completely let all the oil out.
The oil was already very dark, is that normal if I only drive 70 miles with the new oil?
The oil that got out was, approximately 6 liters! When we put the oil back in we left one liter out. When we check again the level it was still higher than the max (but not so higher as it was initially).
What are we doing wrong? Apparently we aren't removing all the existing oil or is the dipstick oil level somehow measuring the wrong value?
As anyone had this problem?
Thank you all for the support.
Thank you JabawokJayUK
, Cuore Sportivo
and others for the information.
To help others in the future to get a fast reply, here is a short resume of all the useful answers:
- On a Diesel engine, when changing oil and even after driving a few miles the oil will have a darker look;
- Although Alfa specifies that the 2.4 engine takes 6.4 liters, when changing oil it is difficult to get all the old oil out: typically you can get around 5.5 to 6 liters if you remove the oil filter or even less (0.75l) if you don't remove the oil filter (not recommended);
- The 2.4 engine has an oil radiator, so that is partially the reason why so much old oil stays in;
- When removing the oil, ensure that the engine has run for a while and that it is still hot. Remove the oil plug and, with the car leveled, leave it to fully drain for some hours.
- Finally, when filling up, put first 5 liters and then start the engine, leave it running for a while and check the oil level. If you get less that 4 bars or if the level on the dipstick is too low, add more oil and repeat the process. The ideal is to get 4 bars with the car leveled. This way you can check if, with time, it lower (=oil leak) or if it increases (it get diluted with diesel).