We're pretty new to our 2014 Regal AWD 2.0 Turbo. Loaded Prem.II group. We got mid-July. I posted pics of it here in the VEHICLES forum, if interested.
Owner's-Manual obviously stresses Dexos-1 Licensed Oils. It specifically states to use the GM Semi-Synthetic 5W-30. 0W-30 suggested if temps frequent -20F....which they CAN here in Fargo, ND!!!
The AWD-System on Regals is by Haldex. I'm trying to learn more about it! Yes, the engine is the LTG. Good info. on it @ this link....
Note also...if you have AWD, Oil-Cap. is SIX Qts.!!
GM LTG 2.0 Turbo Engine...
My first UOA on the dexos1 AC Delco 5W-30 came back after 4200 miles looking quite hale and hearty. The OLM says I could do 6000 miles, and Blackstone agreed; the dealer recommends 5000 no matter what the OLM says. So once my CPO oil changes are over, I'm going to shoot for 4500-5000 on a dexos1 synthetic and not worry. Your turbo is in another class entirely, and a synthetic might well be called for anyway, esp. in your climate.