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  1. Tamgear1

    75W90 Synthetic oil Blackened in Aluminium Gearbox

    Hello, I am running an Aluminium Spur gearbox with 75W90 Synthetic oil around 200F temp in lab endurance test continuously.After 400 hrs the lubrication is failing.The oil is completely blackened out. The oil condition test shows that Phosphorus and Boron particles are burned out. There was...

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