Every car has a story, and motor oil plays a quiet lead role. Some brands built that reputation over decades; others found their edge through bold innovation. No matter the path, they all share one thing—they keep engines moving. This article highlights ten U.S. oil makers that drivers rely on when it really matters.

Castrol

Owned by BP (British Petroleum Plc.), Castrol maintains a strong U.S. manufacturing footprint. With standout products like EDGE and GTX, it remains a go-to choice for drivers who want strong, reliable engine protection. Its advanced synthetic formulas are engineered to reduce engine wear and improve fuel efficiency.

Mobil 1

Mobil 1 is synonymous with performance and is trusted by drivers of everything from daily commuters to elite sports cars. While proudly made in Beaumont, Texas, Mobil 1 is also produced at other global facilities. Its synthetic oils power vehicles from Porsche and Bentley to Chevrolet. Moreover, its Advanced Synthetic Motor Oil leads the industry in wear protection.

Phillips 66

With over a century of expertise, Phillips 66 continues to lead with high-quality motor oil formulations. Its Kendall and Shield brands deliver premium lubrication solutions that keep engines running smoothly. Manufactured across the U.S., its oils are known for their performance-enhancing additives, which make them a trusted staple for American drivers.

Pennzoil

Founded in Pennsylvania in 1913, the company has deep American roots and a commitment to innovation. Building on its legacy, Pennzoil’s Full Synthetic Motor Oil is engineered for cleaner pistons. As a pioneer in natural gas-based synthetic oils, Pennzoil sets itself apart through eco-conscious innovation. Drivers trust Pennzoil for long-lasting engine protection and consistent performance.

Valvoline

Founded in 1866, this long-running American motor oil brand has spent decades improving engine protection. Its High Mileage and Synthetic Blend oils are designed to reduce wear and boost fuel efficiency in older vehicles. A focus on proven formulas keeps it competitive in today’s performance-driven market.

Amsoil

Amsoil revolutionized the U.S. market by pioneering synthetic oils designed for high performance and extreme conditions. Produced in Wisconsin, its products cater to drivers who demand optimal engine protection even in the harshest environments. Amsoil’s Signature Series is a favorite among enthusiasts who require superior wear resistance and long-lasting performance.

Dura Lube

Dura Lube specializes in engine treatment solutions that work alongside your motor oil to boost performance and extend engine life. The company’s additives reduce friction and enhance fuel efficiency. Ideal for high-mileage vehicles, Dura Lube’s formulas are trusted by drivers seeking long-term maintenance benefits.

G-Oil

For eco-conscious drivers, G-Oil offers a green alternative to traditional motor oils. The U.S.-made biodegradable composition provides optimum lubrication while reducing environmental effects. Its commitment to sustainability makes G-Oil a standout in a market increasingly driven by environmental values.

PennGrade 1

PennGrade 1 is a high-performance motor oil favored by racing professionals and classic car enthusiasts alike. The semi-synthetic formula, which is made in the U.S., gives it better protection in harsh circumstances. That racing legacy translates into real-world performance, making PennGrade 1 a top-tier choice for engines pushed to their limits.

Petromerica

It offers a broad range of synthetic and high-mileage motor oils to meet diverse engine needs. The company makes items in the U.S. that are a good mix of price and quality. By offering cost-effective solutions without compromising performance, Petromerica is becoming a go-to brand for budget-conscious drivers who want reliable engine protection.