My only thought was if I could not find the Phosphate stuff as the OEM suggests......but I am sure that I can.
Thing is.....while I do a LOT of work on my own cars.....having read the instructions for changing the timing belt on the 2003 3.0L Sienna.....I would most likely have a shop or dealer do that job.....as it will be my only vehicle.
At that time....I would likley just have them replace the coolant......as it should work out on schedule with both being due around the same time.
One could do drain and refill on their own with no problem either.
My City has a drop off for used antifreeze and oil....so it is no big deal.
As you have suggested......I tend to stick with the OEM recommendations for a vehicle unless I can see a clear advantage not to.
Even a Dealer who charges full list for Toyota branded coolant.......it is still pennies on the dollar as to vehicle maintenance.
I have gotten over 217K miles out of my '96 3.8L windstar, which is rated as a not so reliable vehicle......the coolant is really clean in it...and the vehicle is still running just great.
The Toyota is rated as a reliable vehicle.....so I expect that I will have good service from it.
Like I mentioned above......we are splitting hairs over which coolant to put in a vehicle.......and just changing the coolant at least when recommended......Global, Dexcool, G-05 or Phosphated......we would all be far ahead of the majority of folks who ignore it....and don't change it at all.
Thing is.....while I do a LOT of work on my own cars.....having read the instructions for changing the timing belt on the 2003 3.0L Sienna.....I would most likely have a shop or dealer do that job.....as it will be my only vehicle.
At that time....I would likley just have them replace the coolant......as it should work out on schedule with both being due around the same time.
One could do drain and refill on their own with no problem either.
My City has a drop off for used antifreeze and oil....so it is no big deal.
As you have suggested......I tend to stick with the OEM recommendations for a vehicle unless I can see a clear advantage not to.
Even a Dealer who charges full list for Toyota branded coolant.......it is still pennies on the dollar as to vehicle maintenance.
I have gotten over 217K miles out of my '96 3.8L windstar, which is rated as a not so reliable vehicle......the coolant is really clean in it...and the vehicle is still running just great.
The Toyota is rated as a reliable vehicle.....so I expect that I will have good service from it.
Like I mentioned above......we are splitting hairs over which coolant to put in a vehicle.......and just changing the coolant at least when recommended......Global, Dexcool, G-05 or Phosphated......we would all be far ahead of the majority of folks who ignore it....and don't change it at all.