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What does the w in 10W-30 mean?

Updated: 10/22/2022
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15y ago

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10w means the coldstart viscocity. ---30w is the viscocty at engine operating temperature. By zoomy 10w means the coldstart viscocity. ---30w is the viscocty at engine operating temperature. the w is weight By zoomy

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15y ago
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Q: What does the w in 10W-30 mean?
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