According to the Genuine Fluids page at an online service garage called Arts Automotive:
"Toyota is claiming their Type T-IV ATF does not need to be replaced under 'normal operating conditions'. We strongly disagree. We recommend changing Type T4 fluid every 15K miles, just like regular ATF. Type T4 is not particularly expensive, and the total cost of a transmission drain and fill is only slightly more than a motor oil change." [end quote]
What do the Toyota experts here think? Should I just do a partial drain-and-fill (no flushing) of the ATF now after 24,000 miles on my '06 Camry, or just wait for 100,000 miles or perhaps 60,000 miles. The car is 3.5 years old, and I didn't notice any bad odor or discoloration of the red ATF when I looked at it yesterday via the dipstick.
That was an ATF question, but the following concerns coolant.
The web site for Arts Automotive (a service garage) has this to say about Toyota's Super Long Life coolant:
"We recommend replacing the coolant every 2-3 years or 30K, even with Toyota Super Long Life Coolant. We think it's better to be safe than sorry. Maybe we'll sing a different tune when Toyota releases their Super-Duper Long Life Coolant :) [end quote]
Why would the Camry manual allow you to go 100,000 miles or 10 years with the factory fill of Toyota Super Long Life coolant, but only allow you to go 5 years or 50,000 miles with every refill thereafter. I would guess both the factory fill and your own refills are pre-diluted with distilled water, not tap water--at least if you buy the jugs of genuine Toyota 50/50 coolant.
Anyway, is 50,000 miles and 5 years still too long to wait? Maybe I ought to do a simple drain-and-fill (not flush) of the coolant every
3 years or 30,000 miles?