The Swedish company COT has invented an in-car refinery that continuously cleans oil so it never has a chance to get dirty. The unit works by accepting a steady flow from the engine, excising particles via filter and boiling off unecessary liquids. The oil processor has been tested in Scania trucks and Volvo marine crafts over the past year, and the company intends to make the product available as a retro-fit. The main drawback is the unit's cost, about £200 with £15 replaceable filters, meaning that, according to Thomas Lovenskiold of COT: "It won't save you money until you've done 125,000 miles." As such, the product may be best suited for truckers and other major mileage applications, at least at its current price.

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