At the dealer (Toyota of Redlands) yesterday for a transmission service and coolant flush. I have 60,000 miles on the beast. I mentioned to the service writer that I was early on the coolant flush and he said that per the new recommendations, I was 10,000 over. He showed me a document from Toyota with the new recommendation stating for long service interval coolant, it be changed at 50,000 miles or 60 months rather than the older recommendation of 100,000 miles or 120 months. I asked him why and he said he didn't know. He said that this came out about four months ago. Interesting...