Fellow car enthusiasts, should this car use 92 or 95 octane fuel? What's the fuel consumption per 100 kilometers?

My car showed an engine fault at 3000 kilometers, asking to check the emission system. Should I use 92 or 95 octane fuel for this car? Can someone with expertise help out?

Fellow car enthusiasts, should this car use 92 or 95 octane fuel? What's the fuel consumption per 100 kilometers?

What's the fuel consumption of this car per 100 kilometers?

What is the fuel consumption per 100 kilometers for the Volvo C30?

Do I need to fill the P1 with 92 or 95 octane fuel?

Does the 2011 MDX use 92 or 95 octane fuel?

Hello everyone, why is my car's fuel consumption 10.1 liters per 100 kilometers?

What's the fuel consumption per 100 kilometers for the 911?

What is the normal fuel consumption per 100 kilometers for an Alto?

I've been using 95 octane fuel for two and a half years. Should I continue with 95 or switch to 92? Thanks.