I have a 2019 Accent with the same engine minus the turbo. My manual also states ACEA A5 for the GDi. I went with Castrol Edge 10w30 which meets this spec and it was on sale for around $45 a bottle at SCA so that's waiting for the first service at 15k. My first 1,500km 'service' didn't include an oil change, it was merely a look over. I ended up changing the oil and filter to Nulon Syn 5w30 and a Ryco Syntec filter at 5k because there was no way I was letting that glitter laden break in oil go another 10k!