I hastily picked up a 5 liter jug of Mobil 1 oil for my girlfriends car after she ran the OLM 600 km's past 0%, but I couldn't help notice the jugs of Syntec and other brands next to it that were ~$10 cheaper than the Mobil. I was in a bit of a hurry so I just grabbed it and ran out. The owners manual mentions Mobil 1, but I'm sure some of the other brands meet this spec. I'd rather not pay a premium for Mobil 1 next time, if there's another oil that will hold up just as well. So what are you guys using?