Thanks I’ll probably do the mobile w40. I’m fairly knowledgeable on euro oil but never even heard or learned of this a40 spec, I always just looked to make sure it was a3/b4 and mb 229.5 approvedHave been running M1 0W-40 FS Euro for couple years now on an L59 (flex LM7) Suburban. At 245k it’s very happy. A40 spec is a good one to look for.