A friend having a oil retail shop told me that honda atlas genuine oil wether 5w30 or 0w20, is being packed in pakistan by total pakistan. While the same oil being marketed & sold by total comes pre-packed from korea. You can use both grades in 1.8 civic. Thinner oil gives better protection on cold startup. I own a 1.8 civic 2010 with above 140k mileage. I have been using zic 5w30 in it until recently i switched to liqui moly 5w30 the engine feels smooth and lighter than before.
I have had first two oil changes on my 2018 civic 1.8 with honda genuine 0w20 to keep warranty intact. So far things are perfect. But I have intention to pour liqui moly 0w20 from next oil change and stick to it.