Japanese Coolants

[DR]

Are Toyota, Nissan, and Honda coolants all compatible with each other? I mean as far as top offs, mixing, and the like.

 

[DR]

Thank you much! I added about half a quart of the Honda to the refil bottle in my altima this morning as it was getting low, before I read your post I should mention. Oh well, I'll post to warn others if I have problems.

 

[427Z06]

I wouldn't mix them unless I did some research and was positive they are compatible.

Here's some posts to help you out:

http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=37;t=000007

http://www.motor.com/MAGAZINE/Articles/082004_04.html

http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=37;t=000161

 

[Ray H]

Personally, I doubt that you'll have any problems. The Japanese coolants have more in common, chemically, than they have differences. They all share:

> ethylene glycol as the major (~93%) working constituent,
> reliance on "OAT" technology as the primary corrosion inhibitor,
> a healthy dose of phosphates for quick corrosion inhibitor recovery in the event the organic acid salt layer breaks down for any reason. (the hybrid component making the product a "HOAT" mix)

Their principle differnces are most likely the labeling (duh...) and the leak indicator dye color used. Honda's is green, Toyota's is red, and I have no idea what color Nissan's, or Mitsubishi's is.