hehe, doin an oil change this morning...and no filter wrench..like I have money for that...so.. here's how to make your own with some wire and a 19mm wrench.
wrap wire around closed end of wrench. have it come over the angle...see pic, or else it won't work.
loop wire through, with enough exxcess to loop around the open end for grip.
wrap the wire around the filter and tight as much as possible. then wrap around the open end of the wrench. The slowly turn and it will tighten the wire for you. Use it like a rachet.
It actually worked, try not to get oil on ya!