I learned that the CSG 630 engine was the second engine during the Roadster development phases. This engine was loaned by the US Ford Escape. So this page might help to find a matching oil filter.
http://www.carparts.com/results/?N=0&Nr=AND%28universal%3A0%29&PN=0+5605&VN=4294949419+4294967096+4294953536+4294961723+4294966593&universal=0
