OK time for me to jump in on this... Ok for your Zetec or any engine best thing to do with the oil is use a mixture, or say 3.5 qts of Mobil Drive Clean and 1 qt of Mobil Syn. That is what Syn oil was made for, not using all syn, it was made to go with your normal oil, it doesn't make any difference if you use all syn or only .5 qt or 1 qt, it all does the same thing. As for the pureone oil filter YES they do make them for the Zetec, I had one on my car on my last oil change. Now I have a FRAM and it isn't any different. Just my 7 cents worth of useless information.

~*TJ*~ 97 GL Sport Zetec
~*RIP*~Connie~*1/21/02*

~*Mods*~ E0 SVT Rims~205/55R16 Goodyear American Eagles~

~*Mods to come*~ H&R springs~Konis~Coilovers~17x7 Millie Miglia Avia~215/45R17 S-03's~SVT body kit~98+ OE Spoiler~CAI~Brullen Cat-Back~Turbo (or 2):)~

More to come