If this is not the SE-R then no you do not need to run premium in the car. If you drive the car normal and do not drive excessively hard then defiantly no premium will be needed. Hope this helps and answers your questions!
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No you do not.
Regular grade unleaded is just fine unless you notice a condition called PING which will sound like a rattle from the engine under acceleration. This is caused by predetination of the fuel in the combustion chamber and is usually associated with carbon build up. Since higher octane fuel has a higher resistance to ignite it will help or eliminate ping.
A service know as a valve/intake/combustion cleaning can also help with ping and long term can be a lot cheaper than running premium.
there are other conditions that will cause this but the above is the most common.
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
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