Sudden big increase in estimated range?

I noticed today that my car got a big jump in range according to Teslafi.    Previously, 100% charge for my S75D was around 245 miles, and today its at 301 miles.  When I look at the previous history, it kinda looks like all the previous 100% charge estimations have now become the 80% estimations, going all the way back to the beginning of my logging data.