G-05 and Asian sharing the same NJTS#s..why ??

[440Magnum]

Originally Posted By: LT4 Vette
so G-05 is a no no for Hondas ?

Actually I would think it would be a great choice for an engine with wet iron liners like many Hondas have. Good iron protection, good anti-cavitation additives.

But Honda, like all the asian brands, seems to have a feral hatred of silicates which I just don't understand. There's no sound engineering reason to fear modern low silicate formulas. If I owned a Honda, I'd gladly use G-05.

 

[artificialist]

Originally Posted By: mechanicx
Originally Posted By: LT4 Vette
so G-05 is a no no for Hondas ?

Well Honda like all Japanese manufacturers' coolant recommendations don't recommend silicates, which G-05 has. Zerex actually recommends G-05 for '95 and older Japanese cars. For '96 and newer Zerex recommends Dexcool. Despite the silicates I personally would feel safer with using G-05. Of course the Zerex AVF would be better, and possibly Peak Global.

The 2 Japanese cars that I mostvividly remember needing water pumps were my mom's 1994 Mitsubishi Expo and dad's 1995 Honda Accord, both had water pumps fail in 1998 and the mechanics told us it was because of silicated coolant.

So no matter what year a Japanese car was built, I would avoid silicates.

 

[440Magnum]

Originally Posted By: artificialist

The 2 Japanese cars that I mostvividly remember needing water pumps were my mom's 1994 Mitsubishi Expo and dad's 1995 Honda Accord, both had water pumps fail in 1998 and the mechanics told us it was because of silicated coolant.

So no matter what year a Japanese car was built, I would avoid silicates.


I don't think silicates (unless neglected) had a thing to do with it. A water pump seal is a water pump seal. Nothing special or fancy required to handle normal silicate concentrations.

 

[mechanicx]

Water pumps go out even with silicate free coolant. I think some test studies claimed that waterpump life was longer on average with silicate free coolant but it was not much of a difference. I'm thinking less than 20%. The test could've been anomaly or biased.

I guess it's possible for one waterpump to have a better, harder seal design than another, and making it most compatible with silicates. Although, lots of Japanese cars have been serviced with Green and it didn't seem to shorten water pump life for the most part.

 

[SubLGT]

Originally Posted By: Petersubaru
............. I "doubt" if any Japanese coolant has "inorganic" phosphates in them..not to be confusing here, but, I am only familiar with Subarus and even though they "state" that only Phosphated coolants "must" be used, that is really not the case and a play with words...................


There is indeed phophate in Subaru's green Long Life Coolant.

From the May 2005 edition of Subaru's End Wrench publication:

"Always use Genuine Subaru Long Life Anti-Freeze Coolant,which is readily available at all Subaru dealership parts departments. Its formula incorporates phosphate (non-amine) to insure adequate anti-corrosion protection of the aluminum alloys in boxer engines. If a substitute anti-freeze must be used in an emergency, be certain not to substitute the long-life OAT type found in certain domestic cars. Use only a phosphate (non-amine) formula.Read the label carefully to be sure."

Phosphates are common in Japanese coolants:
"The third coolant also is an H-OAT, but this one—preferred by Asian carmakers—uses phosphates instead of silicates. Phosphates quickly reprotect a cavitation-pockmarked pump, plus the Asian makers use BZT or TTZ to protect copper/brass."
http://www.motor.com/article.asp?article_ID=1655