I was wondering if anyone can help / has any thoughts on oil for my 07 reg RS4 - I have received so much information from garages, websites etc all with slightly different ideas / advice!!
I am running my RS4 on 5W-40 oil at the moment and Audi have told me it is set to the longlife service plan.
I now need some more oil shortly to put in and when I spoke to an Audi dealer today they told me to put 5W-30 oil in it.
Is there a big difference between these oils - is it better to swap over onto the recommended one from Audi or carry on with the 5W-40 - can someone please help me