BENGALURU: The State Government has increased the rate of sales tax on petrol and diesel to 32% and 21% respectively to protect its revenues from auto fuel taxes.The government was losing revenues from this source since the prices of petrol and diesel have been falling in the past 10 weeks.The retail prices of petrol and diesel will now be Rs 70.84 and Rs 64.66 per litre, which is still lower compared to neighboring states, the state government said in a press release.