This isn't with all machines. I'd go ahead and use the thread you have. After taking countless classes and going to different quilt shows you will always have a debate as to which thread to use. it is as debatable as which machine is the best. I was told to use the type of thread that is the same as you fabric. My machine is only a year old and both sew great with cotton. The viking recommends aurofil and I have no problem with breakage. I keep a small paint brush handy and clean my machine often; no matter what thread I use.