I have heard people say that engine is noisier on Mobil 1, but only on this forum.
Is there a reason why some people notice a difference or is it something that would show up in other 0w40 applications or indeed in other 0w?? applications.
The wife's Clio is fairly quiet for a high miles diesel, but does have the odd little rattle to itself on tickover, I just considered it to be injectors or something, has always done it.
Might try a different oil next OCI, has just over 4k on this run of Mobil 1 New Life 0w40.
It can use 5w40 so Castrol Edge FST is a possibility as is Maxlife 10w40, not that a HM is needed it is oil tight and uses nothing really, maybe a cup full over an OCI, might use more if I ran it out to the manufacturer limit of 12k
Will report back with a new thread if I choose a different oil and notice any noise change.