Prices of groundnut and mustard oil fell by up to Rs 100 per quintal at the wholesale oils and oilseeds market owing to slackened demand against adequate stocks position. However, other edible and non-edible oils moved in a narrow range in limited deals and pegged at the last levels. Easing demand from retailers against adequate stocks position on increased supplies from producing belts, mainly led to the decline in groundnut and mustard oil prices.