Oil Durability just mileage or time too?
Hi, Until yesterday I thought the only thing to consider for an oil replacement was mileage (it was what I was told by the mechanics I went to).
Yesterday a friend told me that oil has also a lifetime. I do 4000 miles a year and so I change the oil once a year but my friend told me oil just lasts 6 months top, is he right ?
Thank you for your comments.