Palmolein oil prices firmed up by Rs 50 per quintal at the wholesale oils and oilseeds market backed up by pick up in demand from retailers. However, other edible oils held steady in thin trade. Castor oil in the non-edible section, also recovered on increased offtake by consuming industries. Traders attributed the rise in palmolein oil prices to upsurge in demand from retailers. Rajkot groundnut oil prices moved down due to supply pressure.