JTDM Oil Dilema
Can someone advise on a situation I have with my "new" (to me) GT JTDm please......
I've just had it serviced for the first time (only owned it 6 weeks) and although it wasn't carried out at Alfa, I had asked a reputable garage to carry out a manufacturers recommended service.
To cut a long story short.. they have used 10-40 fully synthetic oil instead of the 5-40 recommended by Alfa. Once I pointed this out to them they have offered to replace with the 5-40 but are saying that the 10-40 is a superior oil?