A used Volvo S60 requires the use of premium gasoline. Specifically, turbocharged engines built by Volvo Cars, including the T5, T6, and T8 powertrains, will require 91 octane gasoline or above. Do not use any gasoline that contains lead or manganese in your Volvo S60. Lead additives can harm your vehicle as well as the environment, and they must not be used in your Volvo S60.