The Dollars and Cents of Re-refined Oil
Generally, re-refined oil costs no more than oil made from virgin stock. In fact, it may be cheaper. You should get a quote from your blender/supplier to find out for sure. The final cost is dependent on factors such as the blend, quantity, and supplier.
Re-refining takes dirty oil and turns it back into fresh, "good-as-new" oil that can be used in cars and trucks. American Petroleum Institute (API) certified re-refined oil is equal to, or better than, oil made from virgin base stock.