PN 109 BG EPR Engine Performance Restoration is a powerhouse of an engine cleaner! It effectively softens, emulsifies and dissolves even the most stubborn fuel gums that clog rings. Engines are operating at higher temperatures than ever before. Combined with prolonged drain intervals and reduced engine cooling, automotive engine oil is under a lot of stress. Continuous thermal and oxidative breakdown contributes to oil thickening, heat retention and deposit formation. These heavy deposits can impede normal piston-ring function; thus reducing fuel economy, lowering power output, and increasing harmful exhaust emissions and oil consumption. BG EPR softens and dissolves hard-to-remove deposits from piston rings in as little as 10 minutes! Properly sealed combustion chambers improve compression and reduce oil dilution through blow-by. BG EPR cleans micro passageways to maintain the critical hydraulic function of components such as valve train actuators and turbochargers. BG EPR restores fuel economy and power and is harmless to seals and other engine components. Excellent for maintenance of Gasoline Direct Injection engines. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.