Thank you for all the answers and suggestions!
What a great place to talk to people, on today's internet, who would have thought?
To add details, it seems oil previously used was a 5W-30, C3, Polish brand called Orlen - which according to Polish internet is decent enough. However, it was...
Greetings from Poland,
Sadly, I have recently inherited my mom's Kia Carens (I think they were called Rondo in Canada and the US). It is from 2016 and has a 1.7 liter Diesel, making approx. 140 hp - in case someone wanted to check the engine.
I wanted to do some maintenance on it and checked...