Technical Knowledge Base
Practical lubrication knowledge for engineers, fleet managers, and industrial buyers — written by the Haruto technical team.
0W-30, 5W-30, 15W-40 — what do these numbers actually mean, and which grade is right for your engine? A practical guide for fleet managers and mechanics.
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NLGI 0, 1, 2, 3 — grease consistency grades explained simply. Learn which grade suits your bearing type, operating temperature, and application orientation.
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Choosing the wrong hydraulic oil grade causes overheating, seal failure, and pump wear. Here's how to match viscosity to your system's pressure and temperature range.
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Switching to a cheaper lubricant to save costs often leads to higher maintenance bills, unplanned downtime, and shorter equipment life. Here's what the data shows.
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