As your Tesla gets older the maximum kW you experience while charging at the SuC will drop and charging take longer. Unofficially several Tesla employees have explained this as a limitation that has been implemented to protect the battery, but the details of the "algorithm" seem to be unknown and officially Tesla has never explained themselves in this matter. Personally I find it unacceptable Tesla makes such changes to my car post purchase. What is next - reduced acceleration when they get concerned about the wear and tear from too many quick starts? It seems that something happens once you pass approx. 30-40.000 miles. The charging curve changes and especially those with the new battery chemistry introduced in the 90D back in 2015 seem to be hit hard by the preventive measures. Several 90' owners report a drop from a max of 115 kW to 96 kW once they passed approx 50.000 km. I have prepared a Google Sheet in which I hope those of you with a high milage (+30.000 miles) will maintain your SuC charging statistics at least once - and especially those with 90Ds. Note there are 2 tabs, one for metric (km) and another for imperial (miles) - just make your pick. Make sure the battery is warm and not sharing a pair of stalls. Tesla Supercharging Speeds Please do no highjack this thread with all the usual comments about battery temperature, sharing stalls etc. I know how all these things influence charge speed and can assure you it has been taken into account.