When you drive home a new Volvo XC90 for sale, it is recommended that you use a minimum of 91 octane premium fuel in order to make the most out of your engine’s high-performance, high-efficiency engineering. If you choose the Volvo XC90 T6 or T8, this fuel will be a requirement, but certain Volvo XC90 T5 models may be able to use 87 octane regular gasoline without harm; please refer to your owner’s manual for full details on fuel requirements.