Originally Posted by RedThunder
any coolants with either one of the two are not approved for use in Honda engines. Yes, they can be used, but when dropout occurs, it's not pretty, what it does to the internals of the engine. Don't get me wrong, use what you want, but if you expect warranty coverage, if you do this while in warranty, it will be denied.
The orange Prestone is also no good as it's OAT (dexcool type) the acids will attack the plastics used in the system. Ask anyone who has a GM with the plastic intake gaskets, what happens to them in very short order.
There has been many a discussion on another site that I frequent that has over 40,000 techs on it, and it's becoming clearer that using OEM fluids is becoming the norm. There is too much risk in not using what they came filled with origninally.
Nearly all car companies are starting to use semi-proprietary fluids.
Technically, they are supposed to supply them to the car owner for free, if that fluid can't be purchased at a local supplier. I don't quite know how they get around that.
some examples, besides Hondas use of coolants, and numerous other fluids.
Here's some that our shop is not able to get outside of a dealership
GM with the blue auto trak fluid for the magnesium transfer cases, I've never seen it anywhere else.
GMs versa trak fluid
Jeep with the quadra drive fluids, again nowhere.
BMW with the 0w60 synthetic engine oil....
VW with the 505.xx oils for all their newer engines, nobody stocks them.
BMW blue coolants? VW's pink G12 coolant?
Daimler Chryslers' orange coolant, which acutally is identical to Zerex G05.
The oil that's now required for use in many cars must be GF4 rated or better, many makes are having sludge problems, even with regular maintenance.
These include DC (2.7, 3.9, 5.2, 5.9gas, and the new 5.7 are very susceptible), Toyota (2.2 and 3.x V6s), Jaguar (V8s), Mercedes Benz (all).
many of us have looked at the new "universal" coolant, that says it's compatible with everything, it's chemical makeup is only close to GM dexcool and some others, but shouldn't be used in others.