Lubricating system for internal combustion engine

A lubricating system for an internal combustion engine, comprising:

• a first oil passage, said first oil passage extending between a crankcase and an oil tank of the engine and including a recovery pump and an oil cooler therein, said recovery pump feeding lubricating oil from said crankcase through said first oil passage and into said oil tank via said oil cooler;
• a second oil passage extending from said oil tank to individual portions of the internal combustion engine needing lubrication and cooling, said second oil passage including a supply pump and an oil filter therein, said supply pump feeding lubricating oil from said oil tank through said second oil passage to said individual portions of the internal combustion engine via said oil filter;
• and
• a branch passage branched from said first oil passage, said branch passage extending to at least one of said individual portions of the internal combustion engine for supplying said lubricating oil thereto.