I did the first oil changes on both of our Sonics last evening. I used AC Delco filters, and Mobil 1 5W-30 extended performance Dexos 1 certified oil.
They both have about 1500 miles on them, and I wanted to get the initial fill replaced. The 1.8 engine is the easier to change oil on; the belly cover doesn't need to come off, and the filter is easier to access. The 1.4 engine requires the belly cover to be removed, and to make the filter access easier, the charge air tube that goes to the throttle body, needs to be disconnected and pushed aside. I used Rhino ramps to elevate the cars for working clearance. I reset the oil life monitors, and checked for leaks.
If this is something you wish to DIY, be sure to log your service, and keep your receipts, just in case!
Papasonic