Prevents valve seat damage in engines designed for leaded gasoline Prolongs the useful life of older engines without updated valve seats 12 OZ Prevents valve seat damage in engines designed for leaded gasoline Prolongs the useful life of older engines without updated valve seats Red Line Lead Substitute is a fuel additive designed for older gasoline/petrol engines which suffer from excessive valve seat wear and piston scuffing when operated on low-lead or unleaded fuels. Many engines designed for leaded fuel, even with hardened valve seats, can fail in as little as 60 hours under high load with inadequate levels of lead. Directions: Add one bottle per tank of fuel. Treats up to 25 gallons DATA SHEET DOWNLOADS Safety Data SheetsProduct Data Sheets AVAILABLE SIZES 12oz 60202 *Only available from our dealers