Volvo XC70 Engine Problems
Premium vs regular unleaded on Volvo XC70
The recommended fuel for the XC70 is 95-octane, which is Premium unleaded. You could use regular unleaded, but you won't get the same economy or performance from it. You could improve your economy by stepping up to 98-octane, but you have to weigh up the benefits against the extra cost of the fuel to determine if the higher quality fuel is worth it.