Is special high-mileage oil worth the extra price compared ... Generally speaking, it’s safe to run synthetic oil in an older or high-milage engine. That’s not what you might read online ...

synthetic blend, and “extended life” and “high mileage” conventional oils—may leave you wondering which is the best for your car, even if you’re just getting the oil changed at your ...

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. It offers a broad ...