I have checked all the area auto parts stores and cant find this HOAT coolant that our cars need. Is there a special place everyone gets it from? The guy at autozone just said oh just put the green coolant in and you will be fine.....yea I just left.......(I'm in the fort riley kansas area)

 

the local benz dealer here uses prestone "mixes with any", we have used it also and it works fine

 

Haven't changed mine yet, put should put it on my winter to-do list (along with changing the fuel filter, etc.). My initial readings said to find an "extended life antifreeze", and my regular stuff that I have a case of definitely ain't it.

 

HOAT (Hybrid Organic Acid Technology)

Do not mix with any other coolants no matter what anyone says. It seems that it is mixed with distilled water only, not deionized water, demineralized water, tap water, local pond water etc.
If the manual says use HOAT and you do not,who you gonna blame when sh#t happens.

 

Zerex G-5....

 

I went into the benze dealer this morning and ask him about the blue benz lifetime coolant ( What the dealer called it) he said benz had changed to a different coolant that was yellow instead of blue and that they where also using it in the AMG engines , I looked at the container it was in and it was from MB but I wasnt sure so I didn't purchase any I thought I would ask and see if anyone on the forum had heard anything like this. I'll most likely go back monday and get 2 or three gallons. By the way he did say to mix with distilled water only and no other coolant.

 

"Zerex G-5."

Where did you find it?

 

It is a Valvoline product so it should be pretty available. I know Sears Auto carries it.

 

I have been told Napa cares it!

 

Sure do ...........ZEREX

 

ZEREX
Overview (From the Valvoline web page)

Zerex® G-05 is the original full chemistry in newer Ford & Daimler Chrysler vehicles. Its Hybrid Organic Acid Technology (HOAT) chemistry combines the best of conventional and organic acid-based chemistry to provide the ultimate protection against rust and corrosion.

For convenience and protection, try Zerex® G-05 Ready To Use. Zerex® G-05 Ready To Use combines the excellent temperature and corrosion protection of Zerex® G-05 with de-mineralized water to help reduce the risk of cooling system deposits. The 50/50 mixture provides protection down to -34°F.

How It Works: Zerex G-05 antifreeze/coolant uses the highest quality virgin ethylene glycol for freeze and boilover protection and a hybrid organic acid corrosion inhibitor package to protect your engines from liner pitting and corrosion.

I said in a previous post to use distilled water and not de-mineralized water, guess what, I was wrong again for the second time this year.
Correction; Zerex G-05 comes premixed with de-mineralized water but the Zerex web site says it is best mixed with distilled water, go figure that out. I guess as a later post here mentions profit over-rules everything and they are admitting it.

 

From Answers.com: "Demineralized water is usually generated through Reverse Osmosis. This process does not remove 100% of the dissolved solids in the water, only most of them. Distillation leaves all of the dissolved solids behind. Distilled water is definitely the more pure type of treated water"

So I'll go with the jugs of distilled, from WM, etc.

 

Looks like it's NAPA for the Zerex G-05.

How many gallons needed?

Anyone know a recent price per gallon?

Thanks.

 

11.8 Qts. From the Owners Manual (pg. 221)

 

"11.8 Qts."

OK, thanks. So 1.5 --> two gallons of antifreeze, unless it is already "premixed" (diluted with cheap water, excellent for profits) then likely three gallons if 50/50 mix (for here).

 

well now im confused! when i checked at my benz dealer i was told the benz coolant with distilled water. now i was also told i could use the g5 if i wanted. but the post says de mineralized water. whats the difference?

 

Just went to WM -- they had Prestone extended life "Dex-Cool". The fine print said meets DC ...

Will need to research it further. Good coupon for a third gallon free (rebate) on Prestone's website.

 

Do not use Dex Cool. Use Zerex G-05 or similar HOAT coolant.
Dex Cool is OAT. HOAT - hybrid organic acid technology is different than OAT - organic acid technology.

 

Zerex G-05 is definitely what you want. My PT Cruiser Turbo has the same requirement and I recently changed it for the first time. Most local auto parts stores looked at me like I was from another planet when I mentioned HOAT compatibility. NAPA locally carries it though and knew exactly what I was talking about when I asked about it.

 

From Popular Mechanics

"How about just pouring orange antifreeze into every cooling system, say, yours? Sorry, but it's not that simple. The new organic acid antifreezes may be used only if the cooling system has an aluminum radiator (rather than copper-and-brass).
However, let's assume the reason you're thinking of a coolant change is because you're changing a cooling system part (pump, radiator, heater, thermostat housing) on a system with a conventional coolant, not an organic acid orange or pink. In that case, don't change to organic acid ora nge, even if the part you're installing is aluminum. Use a fresh fill of familiar U.S. yellow/gold or green silicated antifreeze.
The two orange extended-life antifreezes are compatible with each other, with what's factory-fill in GM ca rs and the '99 Mercury Cougar, and with the pink in VW/Audi cars. However, they're not compatible with a special orange antifreeze in 1998-99 Chrysler L/H cars (Dodge Intrepid/Chrysler Concorde and 300M), a special "hybrid" mix of organic acids and silicates. The green in most Japanese cars contains no silicates, so it's not the same as the green in the parts store. The yellow in some European cars contains some silicates, but it's very different from yellow Prestone, the top-selling U.S. brand. And then there is red antifreeze used by Toyota, and blue used on some European and Korean cars."

It's not so simple anymore.