Do you have to use lucas oil treatment if you use high mileage pennzoil?

No, you do not have to use Lucas Oil Treatment if you use high mileage Pennzoil. High mileage oils, like those from Pennzoil, are specifically formulated with additives to help reduce engine wear, improve performance, and prevent leaks in older engines. However, if you feel your engine requires additional protection or you want to address specific issues, you may choose to use an oil treatment as an extra precaution. Always check your vehicle's owner's manual for recommendations on oil and additives.