My wife has experienced this problem. I found this information on the newer Subaru models: Newer Subaru vehicles with longer maintenance intervals have an additional warning light to alert drivers when there is a need to check the engine oil. In this way, its function is very similar to the low tire pressure warning or TPMS light. The low oil-level warning light illuminates when engine oil may need to be added. It should be noted that certain driving conditions may cause the light to illuminate when the oil level is not low or is only slightly low. These include driving on certain inclines, on undulating road surfaces, during extended periods of acceleration or deceleration, or during continuous turning. Due to its appearance, this new light is sometimes confused with another light that has been around for a very long time, the low oil-pressure warning light.