Why was the standard oil trust formed was it successful?

The Standard Oil Trust was formed in 1882 to consolidate and control the oil industry in the United States, allowing John D. Rockefeller and his associates to eliminate competition and monopolize oil refining and distribution. It was highly successful in achieving these goals, leading to significant economies of scale and increased profits. However, its monopolistic practices eventually attracted regulatory scrutiny, culminating in the landmark Supreme Court decision in 1911 that ordered the dissolution of the trust under the Sherman Antitrust Act.