BG DOC Diesel Oil Conditioner is designed to condition oil in high-output diesel engines. Diesel engines operate at temperatures and pressures. This puts a lot of demand on diesel engine oils and the additives they contain. BG DOC maintains like-new diesel engine power and performance, neutralizes acids and acid corrosion, reduces friction and wear on engine parts, stabilizes viscosity, and prevents sludge through increased oxidation control and soot scatter technology. BG DOC is compatible with all diesel engine oils including synthetic and multi-grade. BG 245 Premium Diesel Fuel System Cleaner removes and dissolves deposits from the entire diesel injection system, including fuel injectors and combustion chambers. Diesel fuel is notorious for its instability. Without adequate fuel stability to control deposit formation, diesels are extremely sensitive to fuel breakdown. Current diesel fuel system cleaners remove deposits from the injector tip but fail to reach inside the injector itself. BG 245 removes and dissolves deposits from the entire diesel injection system, including inside fuel injectors, combustion chambers and is especially effective in removing heavy deposits inside the injectors of high temp. 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. Combined with prolonged drain intervals and reduced engine cooling, automotive engine oil is under a lot of stress. Heavy deposits can impede normal piston-ring function. 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 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.