Reduced parasitic lube system

A lubrication system, comprising:

• a variable flow pump having an inlet in fluid communication with a lubricant source and an outlet;
• a cooler having an inlet in fluid communication with the outlet of the variable flow pump and an outlet;
• a lubrication filter having an inlet in fluid communication with the outlet of the variable flow pump and an outlet;
• a first delivery path in fluid communication with the outlet of the lubrication filter, the first delivery path being configured to deliver filtered lubricant to a bearing system of an engine;
• a second delivery path in fluid communication with the outlet of the cooler, the second delivery path being configured to deliver cooled, unfiltered lubricant to piston cooling nozzles of the engine;
• a return path in fluid communication with the bearing system and the piston cooling nozzles to return lubricant to the lubricant source;
• and
• a screen disposed in the second delivery path for inhibiting passage of large particles to the piston cooling nozzles, the screen disposed between the cooler and the piston cooling nozzles,
• wherein the lubrication system is configured to regulate flow through the piston cooling nozzles.