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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.
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.
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 STOU products for agricultural total-tractor lubrication. Valvoline STOU is SAE 10W-30 with API CF-4 engine performance plus the OEM portfolio above. Q8 T 1000 is SAE 15W-40 with ACEA E3/API CF engine performance plus John Deere J20/J27 and ZF TE-ML 06B/06C. The lighter Valvoline 10W-30 offers better cold-start; the heavier Q8 15W-40 offers higher hot-side protection.
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