Point Well Taken from In Cahoots states that you can use Sewer's Aid on your thread if you have trouble with it breaking or fraying.
Also the book suggest trying an embroidery needle 80/12 or 90/14, or even a jean needle 80/12 or 90/14.

I use Sulky's 30 weight cotton to hand quilt, and I wax it.

Jan in VA

I agree with the advice of trying sewer's aid or mineral oil on your thread.

maybe try a smaller needle and use vertical spool

Sometimes changing the spool position makes a ton of difference. You can simply put a coffee cup behind your machine and put the spool in there an bring the thread up over your machine and thread it. I learned this weekend that even taking the spool and turning it upside down can make a difference in it not breaking; especially in metalic thread.

If you have a computerized machine it is not recommended to use Sewer's aide. I have a Viking Ruby and was told I could damage my machine by using it. I paid way to much money for it to test that thought. I have a small Kenmore but also computerized and I won't use it there either. I can't afford repair or replacement bills.

What works for me is a tension setting of around 3. Either needle should be OK, but the 100 Top Stitch is preferred because of eye size. If you still experience breakage,try lowering both bobbin and needle tension. A large spool cap can be helpful as well.

I have a Babylock Ellure and it has trouble with Sulky thread, also. My machine has horizontal feed, I found if I set up for vertical feed of the thread it does do better. It does help if you use an embroidery needle on the machine. The embroidery needle is made to use with the machine embroidery threads, something to do with the shaft and size/shape of the eye.

I've been able to use Sulky with no problems on my Pfaff. The only time I have had trouble with any thread breaking was when I started speeding through the stitching.

Thanks everyone!!! I finally got through that quilt. Luckily it is a small one!

try topstitch needle a bigger size needle