Have an appointment in a few days for oil service at a local shop for my 718 cayman. They tend to fill with Liquimolly 5w40 but I have a few jugs of M1 5w40 FS I was thinking to bring with me and use instead. Both oils carry the A40 approval (along with most of the same German mfg approvals) so I guess it just comes down to preference. Should I go with the M1 over LM?