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A. Valvoline STOU 10W-30 is a Super Tractor Oil Universal for agricultural equipment — engines, transmissions, differentials with wet-brake systems and integrated hydraulic systems. The product is positioned for total tractor lubrication.
A. STOU (Super Tractor Oil Universal) is a single oil designed to lubricate the engine, transmission, hydraulic system, final drive and wet brakes on a tractor — eliminating the need for separate engine and transmission oils.
A. API and ACEA are the universal lubricant performance standards every reputable oil meets. They are your baseline check — match the code your handbook specifies (e.g., API CI-4 or ACEA E7 for heavy-duty diesel) and the oil is technically suitable for your machine. Every oil on our site lists its API and ACEA classifications.
A. Valvoline STOU 10W-30 meets API CF-4 and CE/SF (engine); and API GL-4 (transmission/axle).
A. An OEM Specification is the lubricant requirement set by a vehicle or equipment manufacturer (e.g., MB 228.3, VW 504.00). When an oil lists the code, the oil manufacturer has developed and tested it to meet the criteria the equipment manufacturer requires. Match the code in your handbook and you have a lubricant engineered for your machine.
A. An OEM Approval means the oil has been formally tested and signed off by the equipment manufacturer and listed on their official approved-products register (e.g., MB-Approval 228.3). An Approval confirms the oil is recognised by the equipment manufacturer for service use in their machines.
A. Valvoline STOU 10W-30 carries Caterpillar TO-2; John Deere JDM J27 and JDM; ZF TE-ML 06A; Allison C-3; and Massey Ferguson M1139.
A. Both are Valvoline multi-functional tractor oils. STOU 10W-30 (this product) is a Super Tractor Oil Universal covering engine plus transmission, hydraulic and wet brakes. Unitrac 80W is a UTTO covering transmission, hydraulic and wet brakes only — not the engine.
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