Valvoline STOU SAE 10W-30 is a premium Super Tractor Oil Universal (STOU) formulated to serve as a complete lubrication solution for agricultural tractors and farm equipment. This multifunctional oil meets the requirements for engines, transmissions, differentials, transfer cases, hydraulic systems, and wet brakes — all in a single product, dramatically simplifying equipment maintenance and reducing the number of lubricants that need to be stocked on the farm.

The 10W-30 viscosity grade offers excellent low-temperature fluidity, ensuring reliable cold-start performance and immediate oil circulation even during early morning operations in cooler climates. This lighter viscosity also contributes to improved fuel efficiency compared to heavier STOU grades, without sacrificing the robust protection needed for demanding agricultural work.

Valvoline STOU is formulated with carefully selected base oils and an advanced additive package that delivers outstanding wear protection for heavily loaded gears and bearings, smooth and consistent wet brake operation, reliable hydraulic system response, and effective corrosion protection during seasonal storage periods. The balanced friction characteristics ensure proper clutch engagement and power take-off (PTO) performance across a wide range of operating conditions.

This STOU oil is approved by numerous major tractor manufacturers and is compatible with a wide range of agricultural equipment from brands including John Deere, Ford New Holland, Massey Ferguson, and Caterpillar. Whether used in row-crop tractors, utility vehicles, or compact equipment, STOU 10W-30 provides the versatile, all-in-one protection that modern farming operations demand, reducing downtime and simplifying maintenance schedules throughout the agricultural season.