"If you cannot convert your facilities into anything else then you have to impair it," he further said. The company would be able to convert its existing plants as per the company's long term goals, he added. MSI plans to shift its entire portfolio to petrol, CNG powertrains. The auto major currently gets 23 per cent of its total sales in the domestic market from diesel cars. It sold a total of 4.63 lakh diesel units last fiscal. Some of the company's models like Vitara Brezza and S-Cross currently come with a diesel engine option only. Others like Swift, Baleno, Dzire, Ciaz and Ertiga also have petrol versions in addition to the diesel trims.