Diesel cars may become costlier by Rs 1.8 lakh. Currently, one of the main reasons for the high popularity of diesel cars is that the fuel is cheaper, which translates into low running costs. Roudra Bhattacharya New Delhi, Feb. 5 Honda, which sells only petrol cars in India, is looking forward to the implementation of the Kirit Parikh panel recommendations. This is because if the recommendations are accepted, diesel cars could become costlier by as much as Rs 1.8 lakh. The Government-appointed panel wants an additional excise duty on diesel cars, besides de-regulation of petrol and diesel fuel prices. This will push up the price of diesel cars. Currently, one of the main reasons for the high popularity of diesel cars is that the fuel is cheaper, which translates into low running costs.