What grade of oil for BMW 325 e90?

For a BMW 325i E90, it's generally recommended to use synthetic oil with a viscosity of 5W-30 or 0W-30, depending on the climate and driving conditions. Always refer to the owner's manual for specific recommendations, as certain models may have slight variations. Additionally, ensuring the oil meets BMW's Longlife specifications (often labeled as BMW LL-01) is important for optimal performance and engine longevity.