A few months ago my car started consuming around half a liter more of diesel on a regular basis. I thought maybe it was the winter weather, but the winter was very mild here in the end. Now the temperature is usually pretty high, as we are approaching spring, so I'm having a hard time finding temperature the problem.

I waited to see how the car will behave after doing a yearly service - oil change, new oil filter, fuel filter, air filter and also changed the timing chain oil tensioner because