Bearing Oil Clearance Chart
Oil Viscosity Rod BearingClearance Main BearingClearance
20w / 5w20. < 0.0021 <0.0020
30w / 5w30 0.0021 – 0.0026 0.0020 – 0.0025
40w / 10w40 0.0026 – 0.0031 0.0025 – 0.0030
50w / 20w50 0.0031 > 0.0030 >
Found this too. Maby 10w40 is plenty thick enough.
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