Thanks this is really useful to know. So the specification of the two oils are near identical by the looks of it. Just making sure there isn't any obvious disadvantage or concern using the M spec instead.
Based on the advice given I'll stop worrying and keep it as it is.
Thank you and this is really what I wanted to know. Would changing the oil for the same equivalent but in 504 spec be a complete waste of money? I'm really just looking to make sure that I'm not going to suffer some form of damage as a result of this little mishap.
Thanks again
Hi all,
Firstly, please excuse my lack of knowledge/ignorence but I've come to this forum for some advice.
My audi RS3 was serviced yesterday by a reputable independent garage who I've used before. I requested before the service that they use Castrol Edge 5w-30 oil as this is what the car has...