I change my oil and the filter every 5000km,and my engine is running smooth after 280.000 Kms,with no oil consumption. Use ONLY full synthetic oil. Personally i use Eneos oil.
I use Valvoline Extended Protection Full Synthetic 5W-30.
Very good on engines and your turbo especially (i have a 2014 st3)
I have a 2011 Escape Hybrid 2.5L with about 175,000 kms. I run Valvoline Advanced 0W-20 full synthetic as recommended by my mechanic. I've found it much better on fuel economy in colder weather than the 5W-20 for multi-seasonal use, especially in colder weather regions (I live in BC, Canada).
Been using Eneos & changing it every 4k miles/4 months. Congrats on the WRX
There is no “break-in oil” just ENEOS brand 0W-20. KIA and ENEOS have a partnership and the factory oil fill is this oil
Valvoline Restore & Protect. Its no joke.
I use Valvoline Synpower
I’ve gone down an oil research rabbit hole many a time. There’s been some extensive studies done and besides liqui moly, studies have shown that Valvoline extended protection has some of the best wear-prevention additives and performed among the best in lab samples pulled from used oil.
My current favorite is valvoline 5w30 full synthetic. There are oil analysis of new that show it has a high 100 C viscosity and it has a ton of really good additives.
I personally run the valvoline, seems to be a tad quieter on the valvetrain.
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