Hello fellow car enthusiasts, I have a question about engine oil. My car is a BYD Song Plus fuel version, and it's currently driven over 30,000 km. According to our maintenance manual, it recommends using 0W-20 oil. I clearly remember that after the first maintenance, the 4S staff suggested upgrading to fully synthetic oil from the original semi-synthetic. However, they didn't inform me that the upgrade would be to a 5W-30 oil, which is inconsistent with the manual. Since I didn't know better, I agreed, thinking it should be better because it costs almost twice as much. I've been using this 5W-30 oil ever since. Last month, when I went for maintenance and asked to switch back to 0W-20 oil, they advised against it, saying it might damage the engine and didn't recommend switching back. In my situation, should I switch back or not? Would switching back really damage the engine? Or am I damaging the engine by not switching back? Any advice from those who know about this would be appreciated.

I am asking the owners of Koleos, what oil did you use for the first maintenance? Is it 0w-20? Is it a high viscosity oil?

Yesterday, I went for maintenance, and they usually use 5W-30 oil. But this time, the technician used 5W-40 oil. I'm not sure if this will have any impact.

Is it okay to use 0W-20 oil for maintenance?

What engine oil is recommended for the Jinxuan 4B11? I've been using the original 5W30 mineral oil from the 4S shop for over 5 years (people say it's like gutter oil [lol]). I want to switch directly to fully synthetic oil. Any recommendations? Some say you should transition with semi-synthetic oil before switching from mineral to fully synthetic. Is this necessary for the Jinxuan?

Is the engine oil for the 2013 Alto 5W-30 or 0W-20?

For the ASX with a 1.6 displacement and 4A92 engine, do most people use 0W-30 oil or 0W-40 oil?

Second maintenance hasn't reached 5000 km yet. Should I use the complimentary oil or switch to synthetic, guys?

I've been driving a 2009 Kia Sportage manual GLS with 120,000 km on it. I've always used 5W-30 engine oil, but recently it seems to be burning oil a bit. Should I switch to 5W-40 oil for maintenance? Has anyone experienced this before and can share some insights?

Changan CS35 Plus, 2023 model, uses CTS-03.08.06. 0W-20 Changan-specific full synthetic oil. How many kilometers should it be driven before an oil change during maintenance?

How long should I wait for the next maintenance after adding semi-synthetic oil?