Oil additives

Not sure about modern additives as oil has moved along since I read a related article, it suggested that many of the components of additives could be removed by your oil filter.

I think you'd probably be better saving your money and spending it on regular oil changes

good quality modern oils dont need additives . i use audis own quantum longlife 111 its good for 19000 mile oil changes but it wont see anything like that milage in my car i will change it about every 8 to 9000 . its what audi use when they service your car and if they have the confidence to leave it for 19000 miles considering they put a warrenty on new cars then its plenty good enough for my 8 to 9000 miles and the best bit is its only £31.00 for 5 litres . so i suggest you forget additives and buy genuine audi oil filters with the money you save

One of the best is Activ8