On Peregrinus we use those dissolving transparent plastic pellets containing detergent and clothes softener. One per wash, never more.
In the U.S., Tide brand. In Europe, Ariel brand. They are exactly the same, made by P&G world-wide.
In any event, in the U.S. we would use any "H-E" ("high-efficiency") laundry detergent, as that is U.S.-speak for Euro-style vertical drum washers such as the Thomson.
SM2K Nr. 350 (2002)