Sitting at a Toyota dealership right now for a 45k service on my 08 Prius. The service rep came out and said the technician recommended a inverter coolant change. Not knowing better, I said OK. Then it occurred to me to look it up. The service manuals, from my reading, say to INSPECT inverter coolant at 15k intervals, but the change is recommended at 100k (I have 47k). I went back in and spoke to the rep, who said "oh, that's an across-the-nation recommendation. The guy doing your service has 30 years experience and this was necessary in his opinion." Did I just get sold a bill of goods? Or is the point of inspecting it at 15k intervals because it just might be necessary at such a short interval?