8lbs load
Wasn't the US testing protocol for usage based on such a ridiculously small load for such huge machines?
The average water usage I quote for FLs to get good ebough wash and rinse performance (if programming is up to par) is about 10l per kg of cotton laundry.
That's round about 1.3gal for each pound of laundry.
If it actually is a 8lbs load 53l seems a bit above minimum, but ok.
At the upper end I usually target double that for more rinses with higher water levels (bedding, towels, comforters etc.)
Also, as I said before a number of times, at least with cottons, more rinses with low water levels give better rinse results compared to same amount of water in fewer rinses.
And the main wash should be pretty low to get the advantage of high concentration washing (see Whirlpool Catalyst).
As long as there is enough dilution afterwards, that is usually a very good way to go.