ok so i have a 01 1500 with a 6.0/80e swap... its been in the truck and running great for about 4 months, the 6.0 has a factory oil cooler and the people that pulled it from the 2500 cut the lines about half way, so i looped it when i put it in the truck and have had no problems until now.. well the other day with it being cold for the first time i guess somthing shrunk, and pulling out of my front yard to go around to the drive way it came apart about half way around so it was started and lubed for about 20sec.. my check oil pressure light came on and i shut it down a few seconds after.. truck never went over 1500 just enough to get it moving and engine was completly cold from sitting 3 hours in 20degree weather so heat on anything wasnt a factor.. went and got mag light to investigate and found problem, next day took 3-4 qts to get to full mark so it was only 2-3 from low mark which i think is good because it didnt run completly run out of oil & theres a trail up to where i shut it off at... now after fixing hose and adding oil my oil pressure at idel when cold is 34psi from idel-2000 but when warm from idel-2000 is 55psi and gos above 60s when getting into it..my main concern is when its cold it will flutter up and down between 30-35 while driving, i havent drove the truck much since swapped or with it ever being this cold so im not shure if its the temp or if possible i damaged the oil pump if thats possible.. once warm it hold steady with no fluttering, any input?