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The SM oil certification requires a successful test of the oil brand at a 300 deg oil temperature sustained for a continuous 24 hour period under load. The bearings are
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A True Z Fanatic
Join Date: May 2009
Location: Halifax
Posts: 1,659
Drives: '13 CTS-V, '76 Vette
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The SM oil certification requires a successful test of the oil brand at a 300 deg oil temperature sustained for a continuous 24 hour period under load. The bearings are then checked for wear. If there is no wear or wear is minimal, then the oil gets certified SM.
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"America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP |
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