Improve your engine’s performance in just one treatment with eFLUSH™. This concentrated formula safely and quickly flushes sludge and varnish deposits and other contaminants from oil passages, screens, hydraulic lifters, rocker arms and other critical engine parts. Harmful crankcase deposits are absorbed and flushed out of the engine when old oil is drained. eFLUSH™ maximizes lubrication, reduces hydrocarbons and nitrogen oxide emissions. May be used alone, but for best results, recommended to be used as part of a complete treatment with an engine flush machine.