Caltex Oil (Australia) Pty Ltd v XL Petroleum (NSW) Pty Ltd

Caltex Oil (Australia) Pty Ltd (Caltex) and XL Petroleum (NSW) Pty Ltd (XL Petroleum) were parties to litigation before the High Court of Australia concerning a dispute over the supply of petroleum products. The core of the disagreement revolved around the interpretation and enforceability of a written agreement between the parties.

The High Court was required to determine whether XL Petroleum had breached its contractual obligations to Caltex by failing to purchase a specified minimum quantity of petroleum products. Central to this determination was the question of whether the agreement contained an implied term that XL Petroleum would use its best endeavours to purchase the minimum quantities, or whether the agreement imposed a strict obligation to do so, irrespective of XL Petroleum's commercial viability or actual sales. The court also considered the implications of XL Petroleum's financial difficulties and its subsequent cessation of business on its contractual responsibilities.

The Court ultimately held that the agreement did not contain an implied term requiring XL Petroleum to use its best endeavours. Instead, the Court found that the contract imposed a strict obligation on XL Petroleum to purchase the minimum quantities of petroleum products, and that its failure to do so constituted a breach of contract. The reasoning focused on the plain language of the agreement, which did not suggest any qualification on the obligation to purchase. The Court rejected arguments that commercial common sense or the parties' presumed intentions warranted the implication of a "best endeavours" term, emphasizing that such an implication would contradict the express terms of the contract. The financial inability of XL Petroleum to meet its obligations was not a defence to the breach.