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2018 6.6L Silverado 2500 HD
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16 Posts
Discussion Starter · #1 ·
Anyone running Rotella T6 full synthetic in there l5p or is the general consensus that these motors like Mobil delvac? And follow up question is anyone happy with conventional over synthetic or vis versa for any specific reason.
 

· Registered
2006 LBZ, 2009 LML, 2022 L5P. 1993 6.5 parked in the shed.
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1,655 Posts
Duramax's are super easy on oil, any CK-4 rated oil will do. Lots run T6 with no issues, lots don't and no issues.
 
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