Originally Posted By: Eddie
Or Hyundai didn't test it yet?
The 2011 Sonata was the first year to introduce DI & Turbo DI. I'm not sure when M1 0W-40 became available (or at least widely used), but it might be possible that due to its low popularity at the time Hyundai felt it wouldn't be necessary to mention it.
Or it could be that mentioning 0W-40 would imply synthetic would be necessary. However that argument falls apart somewhat since they mention 5W-40, which from what I can tell only comes as a synthetic.
In the 2011 manual they mentioned 5W-40 should be used for "maximum performance", whatever that means. In the 2012 and up manuals they removed that paragraph. But they still show 5W-40 as an option under the oil recommendation chart.
It looks like Hyundai leans toward 5W-30 since it offers marginally better fuel economy. Perhaps they don't want to scare away potential buyers by making this car require synthetic only. There claim that dino is good enough. It may be good enough for 100,000 miles, but after that the warranty is up.
I wouldn't be surprised if some turbo models develop problems later on in life. I'm not saying owners will have issues if they only use dino, but it's just something to think about. The turbo used is made by Mitsubishi, it's a TD04 variant. I'm sure they did all kinds of testing to make sure dino was adequate but Hyundai is relatively new to the turbo game.
