How much fuel contamination in the oil can the PetroSavers Engine Oil Refiner remove?

It keeps oil contamination by fuel to less than 0.05% in normal operation, according to laboratory tests. This is less than one-tenth of the critical level (5%) at which an oil change becomes mandatory. However, it cannot handle large quantities of fuel entering the oil as a result of engine malfunction, and to rely on it to do so would endanger the engine.

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