Look, some tactics are used in the market to popularize & de-popularize some items.
I tell you a short story. But before that plz note I am purchasing oils from Pakistan Oil Store which is known is one of biggest oil dealers in Lahore.
In 2016, when fuel prices dropped, then engine oil prices dropped as well.
Caltex, Shell, Total, etc. revised their lubes prices.
But ZIC did not. Because ZIC was so popular here and was catching the biggest share in the market.
Other companies suggest ZIC to revise their oil prices, but ZIC did not. Then a very nice propaganda started. All other companies start calling their dealers to boycott ZIC products because they are not co-operating. So many sole agents (like Pakistan Oil) stopped buying/selling ZIC lubes. And further more started saying to consumers that ZIC quality has been compromised as they start blending oils in PK and everything is being done here, they are importing oils not from Korea but from some third world African country, but they are making oils here in PK, etc. etc. etc.
Now the people (like you) who were regularly using ZIC, the thing start coming to the mind that now ZIC is not good anymore as it was before. Now you automatically start observing the bad performance of your vehicle which maybe because of some other technical issue/s. Now slowly people start staying away from ZIC. And majority of the people were those who were buying ZIC products from local shops or non-authorized dealers.
But consumers who were buying ZIC from authorized dealers, know very well that all this propaganda is running against ZIC so they simply keep ignoring it.
Hope you get the story.
I am not promoting ZIC, but just discussed them here because lot of politics were made against them in recent months. While I know very well the actual news which were behind the Scene.
Moral: Buy product from main dealer. Call their helpline and ask who is the main dealer in your area. They will guide you themselves.