Using Purple Power?

Purple Power is a degreaser only, so yes, you need to still use detergent too.

This is the FAQ's for Purple Power:
www.clean-rite.com/faq
Hope this helps. :-)

Yes, it is something you add to detergent.

Purple Power is primarily a concentrated all purpose cleaner for almost everything but clothes and that is why you'll find it in the automotive section or an auto parts store.

We may be able to help you find a better solution to your problem if you described what kind of stains you are trying to remove.
Grease stains? Try coke or GoJo hand cleaner before laundry.

Check out these suggestion:
www.laundrycare.biz/.../
petroleumservicecompany.com/.../