At the Multi Commodity Exchange, mentha oil for delivery this month gained Rs 7.70 or 0.83 per cent to Rs 933.60 per kg, with a trading volume of 237 lots.
Similarly, the oil for delivery in August edged up by Rs 7 or 0.75 per cent to Rs 945.40 per kg, with a business turnover of 1,468 lots.
Marketmen said a firming trend at the spot market amid restricted supplies from Chandausi in Uttar Pradesh, mainly influenced mentha oil prices at the futures trade.