oil filter siguro mas mganda parin kung orig yung bilin mo...nasa 800 lang naman yun....also I still find the shell 10w40 better than turbo XP...kasi higher ang grade nyan...pero come to think of it...para talagang niloloko tayo nyang turbo XP nayan...kasi kung yang sa shell is 10w40 advertised as semi synthetic, di pano pa kaya yung 15w50 na XP? na inaadvertise as fully synthetic diba? I'm not an engine oil expert pero just the fact that the XP has a lower grade than the shell 10w40 which is labeled as semi synthetic tapos yung XP is 15w50 na labeled as fully synthetic....diba parang napakalaking BS non?

But please correct me if I'm wrong, kasi I really have no concrete idea of lower grade oils being better than higher grade ones...