BTW... NAPA gold... what I use in everything

 

Qoute from Manufactures web site.

"IAT, or Inorganic Additive Technology, is the traditional green coolant found in most older vehicles. This solution offers fast-acting corrosion protection, although the additives are quickly consumed, exposing the cooling system to possible corrosion problems if not changed regularly.
OAT, or Organic Acid Technology, is the formula found in DEX-COOL®, and is usually the antifreeze/coolant of choice for VW and many Japanese/Asian vehicles. This updated formula is engineered to offer long-life corrosion protection.
The downside of OAT is it is not compatible with other types of coolant (IAT and HOAT). In fact, Ford, DaimlerChrysler and others say not to use this type of coolant in their newer models.

HOAT, or Hybrid Organic Acid Technology, is found in newer Ford, Chrysler and Mercedes vehicles. Using the very best aspects of both IAT and OAT, HOAT is a very protective, long-life coolant.



Perhaps one of the most important aspects to look for when next shopping for antifreeze/coolant is approval from the maker of your car. Currently, there is no "one size fits all" solution that is approved for use in newer cars. And filling your cooling system with the wrong solution may result in serious adverse effects.
Products marked APPROVED have been subjected to years of field and lab testing by your car's manufacturer and are certain to provide the best performance and protection. Also, use of these products will ensure your car's warranty remains intact. The same cannot be said for using non-approved products, which may end up causing more problems than they solve. Some quality antifreeze/coolant producers even print the makes that have approved their products for use. This is always the best way to go."

Hope this helps

 

Thats what my dealer told me as well. And it doesn't say anything about HOAT on the bottle. I put it in though and it was the same color as the stuff in there. My 06' developed a small leak at a clamp and I needed to add some fluid.

I just put it in straight because I couldn't find any distilled water around where I am at. Maybe tomarrow I will get some and top it off with the distilled.

Is there any problem with what I did?

 

I just took a 5 gallon bucket and drained out my radiator. Then replaced the coolant with Zerex G-05 and distilled water mixed roughly half and half. Poured in a gallon of one, then the other and so on.


It does mention on the back of the bottle that you should not mix OAT with HOAT, that they are not compatible.

Zerex G-05 is good for all modern Ford and Dodge products and also Cummins engines.


I plan to start draining and refilling every 20K just to keep fresh stuff in it. I know it won't get it all out like doing an actual "flush". But it will be often enough to keep it almost new like. I think I paid 8.99 a gallon at the local GhettoZone for it. I bought 3 gallons and still have about a half a gallon left or so. So $30.00 every 20K miles isn't gonna hurt me to much.


I will just add this to my every "20k" list. Trans fluid and filter, transfer case, differentials...and now drain and refill radiator with Zerex G-05/distilled water.

 

I was looking at this thread AFTER I bought some antifreeze from NAPA...oh, well I'll get my money back. I went explained what I needed. they sold me Zerex Asian Vehicle Long Life/HOAT Formula.

I called another buddy at another NAPA 300 miles away and he said, "Nope, not to use it but to go back explain what I need, see if they have it and if not get my $ back."
****...I guess I should just suck it up and go to Mopar or Cummins and get the stuff. I just want an extra bottle with when I travel on the Alaska and Cassiar Highway in case I need it.
If anyone has any suggestions fire away.
2006 Dodge Quad Cab 4x4 5.9L engine; color of antifreeze in reservoir is pinkish-orange

 

G-05 HOAT is specified as the Dodge factory fill for the third generation Dodge Ram lineup. This formulation is low in silicates whereas the Asian formulated coolants are silicate free. At the present time, four G0-5 HOAT coolants are marketed and readily available. I find that the Zerex and Ford coolants noted below are the cost effective choices over the Mopar and Mercedes offerings. The following list contains those coolants:

1). Valvoline Zerex G-05 Hoat -
Available in concentrate. The NAPA part # is ZXG051 and is a Yellow/Gold in color.
NAPA carries the entire Valvoline product line. If they do not have it on the shelves or behind the counter, a store associate can order it for you. A Valvoline representative informed me that CarQuest typically stocks it. In the event that they do not stock it on their shelves, ask the manager to order it for you.

2). Ford / Motorcraft Premium Gold Engine Coolant - Ford Part #VC-7A Yellow/Gold in color.


3). Mopar 5 Year/100,000 Mile with (HOAT) Embittered (factory fill) Chrysler spec-MS 9769. Red/Orange in color.


4). Mercedes Benz Antifreeze Agent - Part # Q 103 0002 Dark Gold/Bronze in color.

The color or dye contained in coolants is not an indicator of the formulation. The red/orange dye which sometimes appears pink was specified by Chrysler when they made an agreement with their coolant additive producer. Ford specifies a Yellow/Gold dye in their finished fluid.

This G-05 formulation has been proven in the european automotive market for many years as it is very tolerant of the hard water predominantly found there.
When antifreeze concentrate is diluted to 50% by volume with water, the water of dilution must be of acceptable quality. Distilled water is the best to use, but other sources of water are acceptable as long as they are not excessive in total hardness. Higher hardness levels may cause excessive inhibitor consumption, scale deposits and metal pitting, reducing the effective life of the coolant.

 

Dr. Drizzle, I don't know what you do for a living but you just educated me better than any mechanic or salesperson in any auto shop I've EVER been to. Thank you very much.
S

 

So after 2 water pump failures at 10 months each, I read way too much about HOAT coolant. Short story is that even some HOAT coolants by different manufacturers are not compatible with each other and allow galvanic action to corrode certain parts, in my case the wp shaft. Now I don't mess around. If I change brands, I do a total flush, fill with distilled water and baking soda, run for 10 minutes, flush it again, and fill with the right stuff.

what I read was the HOAT works by helping a thin layer of corrosion to form on all surfaces, electrically isolating dissimilar metals and preventing galvanic action. Slight differences in some different brands of HOAT prevent the corrosion layer from forming properly.

 

I asked a friend that drives class 8 truck for a living - miles upon miles a year. He stated that one of the best thing to do for your truck is to go to radiator shop and have them test the acidity of the cooling system. By doing a PH test, they can then determine if any additive is necessary. He stated that the corrosion in the cooling system is caused by not having the correct PH balance. Typically it is $13 to add a bottle of additive.

Sounds like a good suggestion to me. Regarding Distilled water - I believe in it!