High Efficiency Laundry Detergent Do You Really Need To Buy High Efficiency Laundry Detergent For A New Front Load Washer?

Do you really need to buy high efficiency laundry detergent for a new front load washer? - high efficiency laundry detergent

I bought a LG front loader washing machine (4 '.) Feet capacity. Can I still focused with my regular Arm & Hammer liquid detergent - 2x. I would use less detergent because the disc uses less water. Has anyone even a normal detergent? What are the possible dangers? I still have a good part of my regular detergent.