[bills150]

my 1990 4.9L engine has developed a dry start. After 5 seconds or so, the engine sounds great. Oil pressure is normal at first, then the gauge drops past low after about 5 minutes, but the engine still sounds and operates good. What's the deal? Oil pump or screen, bearings, any easy way to fix it before it dies? Slight leak from oil pan, looks like it is rusting from the inside, as after cleaning it the oil just appears from the driver's side of the pan, like sweat. Oil change doesn't help, turns black after a few days. Tried lucas oil treatment, no help there, either. Would like to drive it again. Any ideas?