Despite improving the quality and availability of kerosene products while greatly reducing their cost to the public (the price of kerosene dropped by nearly 80% over the life of the company), Standard Oil's business practices created intense controversy.
Unatoč poboljšanju kvalitete i dostupnosti petrolejskih proizvoda čime je uvelike smanjena njihova cijena (cijena petroleja pala je za gotovo 80% u za vijeka tvrtke), poslovne prakse Standard Oila su stvorile intenzivne kontroverze.