I have made orange wine for many year trying to get the sweetest fruit
possible. The highest SG usually have been @1036, the result have
always been a great wine to, ... cook with. This year I came across an
orange tree that have been hit by lighting, now the fruit look just
great but taste more like a lemon, but here is the strange part the
sugar is 1042! Yes I tried several different fruit and it seems to be
from 1038-42, most are over 1040.

How is this possible since the fruit taste so sour?

SG Brix