Billy Boeing has recommended grease 33 for about a your now for 757 flaps and slats, with the option of using either grease 7 or, where appropriate 17. Unfortunately grease 33 while performing better than 7 or 17, is about 5 times the price. So will our air line use it? will they heck! With the problems of slat disagreement that we have experienced, perhaps it is about time we changed. But as our shares are floating around the 90p mark, may be not!