Diesel Price Surge Boosts Independent Refiners Valero and Phillips 66

Diesel fuel prices have surged by 59% in early 2026, climbing from a January average of $3.365 per gallon to $5.382. This price action, attributed in part to geopolitical tensions involving Iran, has shifted the profit focus from upstream oil drillers to independent refiners. Companies such as Valero Energy (VLO) and Phillips 66 (PSX) benefit directly from the 'crack spread'—the price differential between a barrel of crude oil and the resulting refined products. As diesel demand remains critical for global transport and industry, these refiners are seeing expanded margins. Valero has seen its shares rise 39% this year, supported by a high refinery utilization rate of over 96% in 2025. The company reported 2025 adjusted net income per share of $10.61, representing a 25% increase. Beyond traditional refining, Valero has established itself as a leader in North American renewable diesel and ethanol production, benefiting from government mandates. Phillips 66 has focused on diversifying its revenue through strategic midstream acquisitions, including DCP Midstream and EPIC NGL, creating a fee-based income cushion less sensitive to crude oil volatility. The company has also pivoted toward the energy transition, converting its San Francisco refinery into a sustainable aviation fuel (SAF) and renewable diesel facility. With Valero trading at approximately 10.8 times forward earnings and Phillips 66 reporting a 2025 adjusted EPS of $6.44, both firms are positioned to capitalize on current energy volatility while transitioning toward lower-carbon fuel alternatives.