A QUERY FOR THE EXPERTS.
(I read somewhere above that higher octane is not good for the cat con and spark plugs)
My city's cat con got messed up because of the super unleaded petrol, the dealership advised me to either get a new one, have it removed, or fill my tank with vpower for a while. I chose the latter and it worked. Never switched back.
Fuel average became better with every other aspect. So, when I got the civic 1.8 in April, I have been getting it filled with Vpower (no dilution). How can it be harmful for cat con when it already fixed City's?
Aren't higher octane levels better for the engine?