GReddy Oil Catch Tank for Toyota GR Yaris SpecificationsLightweight and compact this 1L polished aluminium GReddy oil catch tank is specially designed for the Toyota GR Yaris to ensure easy fitting. Its role is to separate and store oil and moisture from the blow-by gas that may foul the engine components before sending them back to the intake in a cleaned state.In addition it collects the engine oil that escapes along with the blow-by gas when driving at high speed and thus prevents the road surface from getting dirty. By periodically checking the amount and condition of the oil accumulated in the tank you can also ensure that the engine is in good health.