Rosehawk,
I made two denim quilts a year or so ago. Pictures are here on QB somewhere. I called them my All Machines denim quilt because I used every machine I had to do something on the quilt. For the most part I used size 14 and / or 16 needles. I tried Universal and Jeans needles and didn't notice any difference. I did notice a lot more resistance to the size 18 needles when I tried them. Being thicker it took more power from the machine to make them penetrate the multiple layers of denim.
Regular needles as has been said. Schmetz and Organ are about the best with others coming after them. The current Singer needles are inconsistent quality wise. Some are really good and some are really bad. Can't tell till you get them in the machine.
Joe
Last edited by J Miller; 09-17-2014 at 06:42 AM.