I thought that feature was found on dryers, not on washers??

Some new machines have it in the washers now too.

I'm helping a friend with research and both Samsung and LG have it in the washer on some models. Both say it can help produce superior cleaning results.

"Samsung's deep steam washers save time, energy and money. Deep steam cleaning boosts washer performance by loosening dirt without pretreating."

"SteamWash System: This revolutionary washing system uses LG's TrueSteam generator to boost cleaning performance and energy efficiency."

I believe some LG's use the steam function for their Allergiene cycle as well. Less hard on fabrics than sanitary cycles.

I love my Miele but every time I read about these Samsung's/LG's I want one too.

Here is a link that might be useful: Samsung - deep steam washer

I'd like one of these companies to please show me how injecting steam into the wash tub will enhance wash performance. It may briefly heat up the surfaces of items in the direct path of the steam jet, but the rest of the clothes are still at a lower temperature and as soon as the load tumbles the steam is unlikely to overcome the thermal mass of the tub, water and laundry combined. It's simply illogical to me.