Corey Foy

Discusses factors influencing optimal oil drain intervals—equipment type, operating conditions, cost, oil analysis—and describes how oil analysis can support predictive maintenance and extended drain intervals.

Explains the role and value of a lubrication specialist/tribologist, covering product expertise, consolidation, OEM requirements, sample analysis interpretation, training, technical documentation, and field support; identifies Corey as the in-house tribologist.

Overview of current engine oil specifications (diesel API CK-4/FA-4 and gasoline GF-6A/GF-6B), their benefits and backward compatibility, and guidance to ensure correct specification use.

A practical guide outlining best practices for collecting oil samples to ensure reliable oil analysis, including sampling consistency, sample points, bottle use, flushing, and sample information.