So the Ford engineers that ran the test concluded that it’s perfectly okay to use the gold coolant in my ‘99.5. And, since it only went back to the 99 MY, there was not enough benefit to offset the possible confusion.

They apparently decided it would just add confusion if they told people now that they could use G-05 in some – but not other – older vehicles. Here’s a post I just made yesterday on another forum.įord has now approved use of the “yellow” or “gold” coolant in all ’99-up PSDs that originally came with the green coolant.īut the Ford F CSD decided not to follow up on the engineers’ recommendation to make G-05 backward compatible through the 99 model year. Zerex is not identical to MB fluid.įrom the horse’s mouth – MB coolant and Zerex ARE NOT IDENTICAL. Again, its a personal decision but I have been treated well by M/B and have not felt I was being price gouged over the long haul.ġ) MB Coolant and Zerex G-05 are identical. I have found however that there is a give and take when it comes to buying O EM. The decision to buy OEM is a personal one and I agree that maintaining one’s vehicle is an extremely personal decision so far be it from me to criticize someone for their decision. Valvoline, around 2000, began producing Zerex G-05, using the BASF formula. G 05 was first used by Mercedes in the 1980’s in Europe. HOAT applications typically contain silicate. HOAT (Figure 2) - HOAT technology contains organic acids and several inorganic additives. OAT is an extended life coolant with a life expectancy of 5 years/150,000 miles. What is the difference between Hoat and oat antifreeze? YellowZerex G-05 Yellow Ready To Use Antifreeze – 1 gal. By mixing these you may lose some of the valuable benefits of HOAT. A 50% to 70% concentration range is suggested for optimum corrosion protection.Ĭan Oat and Hoat coolant be mixed? No, HOAT coolants are not compatible with OAT or NOAT coolants and should not be mixed, even if HOAT is a hybrid mix of OAT and IAT coolant. The chart at the top right provides mixing information. When diluted 50% with water, Zerex G 05 protects modern engine components from winter freezing and summer boil over.

Zerex G05 Antifreeze/Coolant is proven to maximize engine life in newer Ford, Chrysler and Mercedes-Benz cars, light trucks and heavy-duty vehicles. Provides protection for 5 years / 150,000 miles in light duty applications and 3 years / 300,000 miles in heavy duty applications. The Zerex is a slightly lighter color, but it is recommended for your JK. Yes, Zerex G-05 and Mopar Brand HOAT are both the correct coolant for your JK. Is zerex G 05 compatible with Mopar Hoat? I would not, however, mix DexCool with G-05 or G48, as the chemistry and inhibitors used are different and incompatible. The DexCool™/Prestone Extended Life™ is not HOAT, but is OAT – i.e., not hybrid, has 0 silicates. What does that mean? I’m not 100% sure, but I do know that it has a specified amount of silicates in it. This is what I can tell you about G05: it is a hybrd OAT formula. ZEREX G05 antifreeze/coolant uses the highest quality virgin ethylene glycol for freeze and boil over protection and a hybrid organic acid corrosion inhibitor package to protect your engines from liner pitting and corrosion. Zerex Antifreeze by Valvoline is the answer to universal coolants. Per the 5th printing of the 2012 Focus Owners guide: DO NOT MIX different colors or types of coolant in your vehicle. Zerex G-05 does not meet this requirement, but Ford WSS-M97B51-A1 instead which is the Motorcraft specialty gold equivalent. It contains a high quality defoamer system and will not harm hoses, plastics or original vehicle finishes.Is ZEREX G-05 the same as Motorcraft gold? Valvoline G- 05 is compatible with quality glycol based coolant commonly available. A 50% to 70% concentration range is suggested for optimum corrosion protection. When diluted 50% with water, ZEREX G- 05 protects modern engine components from winter freezing and summer boil over. The ATSM and field test data has proven the high performance corrosion inhibitor package and universal compatibility of G- 05. The formulation is designed for both petrol and light diesel engines.

Zerex G- 05 Antifreeze Premix coolant is a long life, universal ethylene glycol based formulation suitable for passenger cars, light duty trucks and 4WD vehicles.

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