Guys I am exhausted from news about Tesla crashes, and other sad news, what about an update in ICE lubrication. With more than 100,000 Volts in the street, I would love to hear about OIL preferences by this forum's members. The social media is full of opinions, AMSOIL against the rest of the world.LOL. I know it has to be 5W-30 Dexos 1...but not all dexos were created equal? I read that a major oil company like EXXON somehow gets under the skin of GM , and suddenly MOBIL 1 is"recommended" ,becoming a must to have... and other oils like Valvoline less expensive are rarely mentioned. In the meantime the AC DELCO oil, GM baby is very hard to find. I know OIL is OIL but there must be one that is the best for our Volts. Thank you for your comments.