Hi all I was just wondering wether a 51plate 1.6 focus zetec se has wet or dry cylinder sleeves( I think the wet ones are the ones u can remove a replace) as I was considering doing A minor rebuild as a friend done it to his Renault Clio 2 l sport( he done rings, valves and valve springs, sleeves and polished) and he said that he got slightly better mileage plus better performance( smother) is this true if so how much. Thanks in advance