MAINBOARD-LISTED AP Oil International's full-year earnings surged 38 per cent to $5.76 million.

Turnover for the 12 months ended Dec 31, 2012, rose 36 per cent to $90.06 million, from $66.32 million a year ago, as both manufacturing activities and trading volumes increased.

But a 40 per cent jump in cost of sales to $75.2 million resulted in gross profit rising 16 per cent to $14.8 million.

Earnings per share rose to 3.50 cents per share, from 2011's 2.53 cents.