Standard steel heating oil tanks are strong and durable but, like most things, they eventually need to be replaced. Internal corrosion, caused gradually over time by natural condensation, is usually the reason. Most homeowner insurance and oil dealer service policies do not cover oil tank replacement. With our proactive annual TANK-GUARD® Oil Tank Protection Program, qualifying tanks are protected against damaging internal corrosion with an effective liquid corrosion inhibitor to reduce the risk of tank failure. Plus, you will be protected financially with a generous tank warranty if your tank should need to be replaced while it is registered on our program.