Moin… Just coming with my Omega 2.2dti from the Inspection. There I was filled with the ELF 0W40 with the specification ACEA A5/B5. Now my questions: Lt. Opel should be used ACEA A3/B3. Is it now the wrong oil ???? Can it be mixed with the A3/B3 oils if you have to refill ???? Are problems to expect ??? Greet Felix