7 Best Subaru Full Synthetic Oils 2025 in the United States

The Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil is a high-quality option for those needing full synthetic oil for their Subaru. Its 5W-30 viscosity grade is suitable for a wide range of temperatures, making it versatile for various driving conditions. This oil meets or exceeds several important API certifications, including API SP, API SN with SN Plus, and GM dexos 1 Gen 3, ensuring it adheres to industry standards for engine protection and performance.

Additionally, it features an advanced additive package that provides 40% better wear protection and 25% better deposit protection compared to industry standards, which helps in prolonging engine life by reducing wear, friction, heat, and deposits. The synthetic base oil type offers robust protection against contaminants, promising up to 24 times stronger protection against engine-killing elements than leading competitors.

Valvoline has a long-standing reputation, and the product is made in the USA, adding to its reliability. However, it’s worth noting that it might be more expensive compared to conventional oils, and the case of 3 package may be more than needed for some users. This motor oil is an excellent choice for those seeking dependable and advanced protection for their Subaru engines.

The Subaru 75W90 Extra S Gear & Transmission Fluid is specifically designed for manual transmissions, making it a suitable choice for Subaru WRX and STI models. Its viscosity grade of 75W90 ensures it performs well in a range of temperatures, providing smooth shifting and protecting gear components.

This product is genuine Subaru, which means it meets all OEM recommendations for Subaru vehicles, ensuring compatibility and high performance. The 5-quart bottles make it convenient, especially since the previous 5-gallon pails are no longer available. This is particularly beneficial for those maintaining their vehicles at home or in smaller workshops.

This gear oil is best suited for Subaru owners with manual transmissions looking for a reliable, manufacturer-approved option.