Like the Sacklers and Purdue  the oil industry normalized death to ensure profits weren’t lost

By the early 1920s, the hazards of lead were well known – even Charles Dickens and Benjamin Franklin had written about the dangers of lead poisoning. When GM began selling leaded gasoline, public health experts questioned its decision. One called lead a serious menace to public health, and another called concentrated tetraethyl lead a “malicious and creeping” poison.

Source: A century of Criminality: How the car and gas industry knew about the health risks of leaded fuel but sold it for 100 years anyway