Oil pressure sender leaking.hss Been changed. Why dies my gage still read 10 - 20 lbs if pressure. Should be reading @ 50 - 60

What is your question?

Driving notice oil gage whent to low side red line. Pulled over shut off. No oil on dip stick. Ran normally no noise no loss of power. Changed oil pressure switch. Gage now not reading above 30 lbs. Under load. Oil is full. Van has 202467 miles on on it.

How long has your 2000 Chevrolet Astro had this problem?

2 days