I was not able to sleep with this in mind... I did calculation for lug nuts.
So, according to spec, Toyota's OEM lug nuts weight is 80g each.
But I measured, they really weight 1369g in total (68.45g each).
Honda's OEM according to spec is 30g (real weight is not yet confirmed, may be some time I will get it). All together 30g x 20 = 600g.
Weight saving is
769g.