Basic theory: 20K OCI on a 1992 Buick Roadmaster wagon with a TBI 5.7 V8
Oil: SJ Kendall GT-1 30wt
Variables: unpredictable driving conditions, ranging from long trips to 5 minute sprints with engine on/off/on scenarios
How?: 1 solid 10K run with a filter change and top off at 10K, 1 solid 5K run with filter change and top off at 15K, another 5K run with complete oil and filter change at 20K
Why?: In theory, presuming a full quart for top off at the filter changes, the fresh 30wt oil should be sufficient to refresh the additive package and TBN, without sacrificing the tribofilm antiwear layers already in place with the used oil
Thoughts?
Oil: SJ Kendall GT-1 30wt
Variables: unpredictable driving conditions, ranging from long trips to 5 minute sprints with engine on/off/on scenarios
How?: 1 solid 10K run with a filter change and top off at 10K, 1 solid 5K run with filter change and top off at 15K, another 5K run with complete oil and filter change at 20K
Why?: In theory, presuming a full quart for top off at the filter changes, the fresh 30wt oil should be sufficient to refresh the additive package and TBN, without sacrificing the tribofilm antiwear layers already in place with the used oil
Thoughts?