Madusha Gallage

@CrosswindHi, I just bought a 2010 Cerato as my 1st car last week. Can I know if you have ever encountered engine knocking issues? Car reports in USA says there's a knocking issue especially for 2.0L engines where the engine has to be replaced. I didn't find such for 1.6L. Btw, is it okay to use 92 Octane fuel? Manuals for 2.0L & 2.4L says to use above 91. Kia Agent said they recommend 95 Octane (all agents of any car brand recommends 95 even it's not required in the manuals. They just recommend without reason). What's your suggestion? Thanks in advance.