I have the same turbocharged Civic with 1.5T. Factory fill has been obviously diluted and total sump volumed increased - drained around 4qts. I switched over to Amsoil and ran it for about 5.5K miles. No oil level increase on the dipstick. Ran the UOA with polaris: first time they found severe fuel dilution, asked them to rerun the sample and no fuel dilution was found, wear metals look good. Currently running same oil and oil level on the dipstick is rock solid. With that said, I'm not sure if FD is currently present or it is not. I'm also running a catch can that collects a little bit of the blow by oil. I guess what really is important is not to run bad gas and not to lug the car. Do 5k OCI with real synthetic, do couple UOA to ensure good wear and you'll be golden. Enjoy the car, hopefully you opted for manual