But the array of oils you’ll find lining the shelves today—regular conventional and more pricey synthetic, synthetic blend, and “extended life ... The alphanumeric codes on a quart of oil—5W-30, 0W-20 ...

synthetic blends, and full-synthetic oils, such as its Ultra Platinum, High Mileage, and Platinum Euro lines. Havoline is a motor oil company with a history of experimentation and innovation.