Well, it depends. There are a lot of variables!
Recently, I was washing blankets and quilts at a laundry mat and I overheard a conversation that got me thinking about my experience with laundry detergent. The owner of the laundry mat saw someone using Sun Detergent and told him that it only contained 20% soap and the rest of it was fillers and water. Hmmm….I knew this was a detergent found at the dollar store and very inexpensive, but it sounds like you’re getting what you pay for with this one. The owner did say that he has been using Kirklands detergent found at Costco and was a great value for what you get.
I got busy doing some research and here’s what I’ve found from several onsite reviews. These are the most common in alphabetical order. These reviews are of each detergent brand as a whole. (See what I use and my thoughts below.)