Prestone was copy-paste dexcool dyed lemon juice green for over 15 years, now it’s Dexcool with phosphates. Most store brand universals including SuperTech are still dexclones to this day. The hulk green coolant people are thinking about has been phased out for over a decade and can be found at the back shelf of the auto parts store as “conventional“ green.
Peak has Global Lifetime and 10x (basically asian OAT coolant without phosphates) as their universal offerings and they are really the only modern american 2-EHA free coolant there is.
That's what I thought at first too, but I still have to wonder if it is still a slightly different formulation that just happens to be dyed the same color. The Ford yellow is an OAT coolant with the addition of phosphates. I believe the universal coolants such as Prestone and Peak are phosphate free OAT coolants according to most antifreeze reference charts I've seen. I could be wrong though. It's hard to know for sure because Prestone doesn't provide much information online about what is actually in their products, and they may have changed the formulation over time. However, Prestone does recommend the Cor-Guard yellow for the 2019+ Fords using Ford Yellow, while recommending the grey bottle Dexcool for the 2011-2018 model years using Ford Orange (see image below). I'm inclined to think that the Ford yellow would be more comparable to the pink POAT coolant used in modern Toyota vehicles, or perhaps the blue POAT coolant that Honda has used for years, as well as newer Mitsubishi, Nissan, and Subaru vehicles. For comparison, the "Ford Specialty Green" Ford briefly used about 10 years ago is essentially the same as the green POAT used by Mazda, Hyundai, Kia, and older Mitsubishi, Nissan, and Subaru vehicles. Just goes to show that you can't rely solely on color to distinguish different coolants.highly suspected to be prestone with cor-guard which is a poat/p-hoat with 2-eha and pours out like mello yello
Peak 10X and GL are both POATs.That's what I thought at first too, but I still have to wonder if it is still a slightly different formulation that just happens to be dyed the same color. The Ford yellow is an OAT coolant with the addition of phosphates. I believe the universal coolants such as Prestone and Peak are phosphate free OAT coolants according to most antifreeze reference charts I've seen.
Upon further investigation, I believe you are correct. Prestone and Peak have reformulated their universal coolants recently for even longer life. The product in the older style jugs that claimed to be good for 5 years, 150K miles was a phosphate free OAT formulation similar to Dexcool with a different color dye and perhaps minor differences in the additives. The antifreeze reference charts I mentioned in my previous thread were a few years old and describe this version of both brands. The newer jugs of both Prestone and Peak now claim that the coolant is good for 10 years, 300K miles. I believe along with this comes a new formulation that includes phosphates. So the latest universal coolants are now POAT similar to what the Asian car companies have been using for many years as well as Ford with their new Motorcraft Yellow. The attachment I have included summarizes this. Some retailers still have existing inventory of the older formulation, so it is important for people to realize the differences in what they could be buying.Peak 10X and GL are both POATs.
Prestone’s transition to Cor-Guard removed all references to being phosphate free. The addition of phosphates is without a doubt what makes it a 10yr/300k capable coolant.
It is important to note that the colors for the European coolants can vary among brands for the equivalent formulation. First, there is the G30 or G12 formulation which is a silicate free OAT. Zerex uses violet for this, but this is actually European Pink for Prestone and Peak. Next there is the G40 or G12++ coolant which is an OAT coolant WITH silicate (Si-OAT). Zerex uses pink here, but Prestone and Peak use violet. Lastly, there is the G48 or G11 formulation which is a HOAT coolant WITH silicate. Peak uses blue, and Prestone and Zerex use teal.Good catch. I hadn't seen that one yet. Probably Prestone's version of the Zerex and Peak product.