Hi TravisM,
Thank you for your inquiry, here is our response to your question if the Samsung - 4.0 cu. ft. High-Efficiency Top Load Washer with ActiveWave™ Agitator and Soft-Close Lid - White requires you to use high-efficiency laundry detergent?
For the best cleaning results, use a high-efficiency detergent such as Tide HE, Wisk HE, Cheer HE, or Gain HE*. High-efficiency detergents contain suds suppressors that reduce or eliminate suds. When fewer suds are produced, the load tumbles more efficiently and cleaning is maximized.
(* Brand names are trademarks of their respective manufacturers.)
You can turn to page 36 under the Product manual link for reference.
https://downloadcenter.samsung.com/content/UM/202101/20210125163747452/WA3000A_DC68-03850F-00_EN_CFR_MES_R_071220.pdf
Reference number :
1144212942
Thank you for choosing Samsung,
^Ross