Originally Posted By: Jim Allen
Thanks Tom. Useful answer, especially the "surprises are common" part, which is especially informative.
Following up, I wonder how common failures are using uncertified oils? I don't mean uncertified like some of the "road oil" you have called out at PQIA, but an oil made from quality ingredients that created a "surprise" due to lacking some ingredient needed for a specific application. I imagine this might be difficult to quantify because of all the "noise" in the failure data and incorrect interpretations of root causes.
Surprises can be positive or negative - they are just unanticipated results, which is why trying to predict performance without testing is inappropriate. Negative surprises should only occur in the lab; field failures are very rare if the research and development are done right.
Most uncertified oils claim older or obsolete specifications such as SA through SJ, which are not certifiable. With the exception of some of the really poor oils PQIA uncovered, failures with these oils are most likely related to misapplication, such as using an SA oil in a modern engine. I would expect failure rates to be extremely low for oils that are properly developed, blended, labeled, and applied.
Tom NJ
Thanks Tom. Useful answer, especially the "surprises are common" part, which is especially informative.
Following up, I wonder how common failures are using uncertified oils? I don't mean uncertified like some of the "road oil" you have called out at PQIA, but an oil made from quality ingredients that created a "surprise" due to lacking some ingredient needed for a specific application. I imagine this might be difficult to quantify because of all the "noise" in the failure data and incorrect interpretations of root causes.
Surprises can be positive or negative - they are just unanticipated results, which is why trying to predict performance without testing is inappropriate. Negative surprises should only occur in the lab; field failures are very rare if the research and development are done right.
Most uncertified oils claim older or obsolete specifications such as SA through SJ, which are not certifiable. With the exception of some of the really poor oils PQIA uncovered, failures with these oils are most likely related to misapplication, such as using an SA oil in a modern engine. I would expect failure rates to be extremely low for oils that are properly developed, blended, labeled, and applied.
Tom NJ