Mumbai, Dec 7  :    Mumbai, Dec 7 :  The decision by oil giant B P-Amoco and Castrol of UK to acquire 20 per cent in Castrol India through an open offer has fuelled expectations of a similar move in its other subsidiary, Foseco India. The stock markets were rife today of an open offer in the company. Castrol India scrip closed higher at Rs 68.40 after opening at Rs 63.50. It witnessed 180 trades with 18,070 shares traded, resulting in a total turnover of Rs 12.15 lakh. The scrip thus flared up by around 8 per cent as compared to the previous finish of Rs 63.35. BP-Amoco, which has taken over Burmah Castrol globally, yesterday announced a 20 per cent open offer in Castrol India at a price of Rs 312 per share. The acquirers are planning to buy up to 2.47 crore shares, of the issued capital of Rs 123.5 crore. The offer price was at a good premium of 34 per cent than yesterday's closing price at the BSE. Reports about the open offer which was anticipated by the markets today resulted in the Castrol scrip registering a sharp rise in the BSE today. The scrip finished at Rs 271.65 after opening at Rs 238.95, thus hitting the upper circuit filters. Based on the premium offered for Castrol India shares, market expects the UK-based parent to come up with a 'decent premium' in the case of Foseco India as well. Burmah Castrol holds over 58 per cent in Foseco India.