Engine Formula: Super concentrated 100,000 km. (60,000 miles) formula for street use engines. This unique treatment that dramatically reduces friction, heat, noise, wear, and oil, energy and fuel consumption. Will not drain out during oil change, because it treats the metal, not the oil. Does not contain lead, moly, silicon, PTPE, chlorinated paraffins or graphite. Compatible with synthetic oils. Money back guarantee. www.metallube.com. Tel. (787) 769-7676. Fax: (787) 769-7700. www.metallube.com.