The independent watchdog group, Petroleum Quality Institute of America (PQIA), provides information to consumers regarding lubricant quality. As such, PQIA purchases various lubricants at random and sends blind samples to Southwest Research Institute (SwRI) for testing, there again, utilizing the industry standardized test method, ASTM D5185 (ICP).
Here is what PQIA recently reported for Shell Rotella T Triple Protection, SAE 15W-40, API CJ-4/SM.
