Yamalube outboard gear oil is for OBM engines.It's specially formulated to handle the high loads and extreme conditions that these engines often face. Regular automotive gear oil just ain't gonna cut it; you need the proper additives and viscosity to keep your gears protected and running smooth. Using the wrong stuff can lead to premature wear and failure, costing you a whole heap more in the long run. So, stick with the Yamalube. It's what your OBM engine deserves.
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