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Heat Tech – Premium Oil Additive Clogged screens, filters, and nozzles cause unwanted service calls and increase maintenance costs. ThermoGuard Premium Heating Oil Additives help keep screens, filters, and nozzles clean and operating at peak efficiency. This results in maximum energy output, fewer service calls, and savings. Through the use of detergents, dispersants, stabilizers, corrosion inhibitors, and optional cold flow improvers ThermoGuard will help to: Prevent sludge formation. Maximize filter life. Keep fuel lines and tanks dry. Protect Fuel system from rust and corrosion Keeps screens, filters, and nozzles clean of deposits. Reduce breeding ground for bacteria and algae. Reduce smoke and particulate. Reduce pour point (optional formula).