Vehicle : 2014 Buick Regal 2.0T : few questions : 1. Can I use this oil or does GM require only using Dexos 1 in a gas engine? 2. Has this oil passed any of the new lspi testing? : 3. Being C3 rated is the hths 3.5 > ? : 4. I believe this is a low saps oil, can it handle a 5k oci in a turbo application (60% hwy) ? Thanks.