A Core deposit is a form of deposit you pay until returning your old part. If you don't have the core at the time of purchase, you must pay the core charge. That charge is refunded to you when you return the core.
Wolf’s Head Heavy-Duty Motor Oil is a high detergent oil, blended from quality lube base stocks and special additives and designed for all-weather conditions.
Wolf’s Head is formulated to protect car and light truck engines during the stress of cold starts and short trip driving. Heavy-Duty offers better protection against wear and high temperatures than SL oil.