Why does the red oil.light come.on when the car is stopped.and.the gas tank readoftank

Hello, if the oil light comes on, it indicates low oil pressure present in the engine. Either this is true, and there is an internal engine concern, or the oil sending unit could be faulty. Hands on testing with a manual gauge present to check actual internal engine oil pressure is needed. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops