My roadster did 130.000 km in march of this year. I went for the yearly maintenance to Tesla with a standard range of 278 km and a CAC value of 146. The day after I got it back with a CAC value of 141 and a standard range charge of 269 km. I have asked Tesla what did happen and they could not tell me more than that the pack was tested and OK and did not understand the drop in value. The following days I did one range charge and went to a long drive immediately after charging finished. After that I kept it on electricity for a few days but nothing changed. What has happened? Next time I will tell Tesla not to touch my pack as clearly maintenance jeopardises the state of the battery? Now 2 months later I did end up and an ODO of 148.000 and did roughly some range charges followed by long trips and notice every 2 weeks a gradually climbing of the CAC value. Today I am on 143,97. I do drive easy average 100km per hour and most of the time long highway trips. What is happening? Is the degradation of the pack not lineair? Just yesterday I did a race on a circuit burning 270km range in 120 km speeding and a few times getting into power limiter. Surprisingly the CAC ends up at 144. So is it fair to conclude: 1. Tesla do not touch my pack anymore 2. Do a range charge every 2 or 3 weeks followed by immediately emptying the pack by a long trip? It got me thinking that outside temperature has an impact. However last year I had a standard charge value of 293 km in june and 20.000 km later in september degradation montly to 278 km. What is the best way to move forward in respect of battery life time?