Originally Posted by Warstud
Originally Posted by Sayjac
As discussed
here in the past, when it comes to Chrysler FCA AFs from 2013 on, the Zerex chart( found on Amazon) is incorrect. As shown in this thread, FCA does not spec DexCool. As for other outside recommendations ("DC datasheet"), I go by what the vehicle manufacturers use first, in this FCA/Chrysler/Mopar. Current Mopar OAT contains/uses no 2eha inhibitor which is found in DexCool.
Thus to topic, I agree with the comments recommending FCA OAT which is what ended up being used.
I talked with someone at Valvoline/Zerex last night and asked about there application chart. He didn't know a whole lot but forwarded my questions to the formulators and I just recieved the e-mail.
This is from our formulator:
"From 2003 - 2013, Chrysler used G05. That formula is a Hybrid Organic Acid Tech using both organic acid and inorganic additives for corrosion protection. From 2013 to current year, Chrysler specifies an Organic Acid Technology (OAT), so dropping the inorganics from the formulation. Valvoline's Dex-Cool uses 2-ethyl hexanoic acid to meet the required OAT specification. The OE doesn't typically specify which specific organic acid to use. Our Dex-Cool is formulated to meet/exceed Fiat Chrysler MS-12106 specification."
Thank you,
Matt
Valvoline Product Support
That's an interesting reply from VPS. While I agree the OE may not typically specify the Organic Acid used, in the case of Mopar OAT it's known for a fact that it uses no 2eha found in DexCool. So while Dex Cool with 2eha meets the DexCool spec, and it may be formulated to meet/exceed the noted spec, it uses an inhibitor that Mopar OAT does not. And it is one that tends to be controversial to use in applications for which it's not designed. That said, if one is comfortable using DexCool in their FCA vehicle specing Mopar OAT, have at it. As noted, I would not do it.
My 'speculation' in this case is that since Zerex/Valvoline offers no same as Mopar OAT, they recommend the closest OAT they have, in this DexCool. Iirc at one time they also made no Asian Phoat AF, before ZAF, and they used to recommend Dex in their AF use charts. Then they added ZAF and gone was the Dex recommendation.
I have nothing against Valvoline/Zerex at all. I'd use any of their AFs where applicable. That includes DexCool, in DC spec'd vehicles. And thier ZAF and WM Zerex/Valv Asian AF, I'd use without hesitation in an Asian vehicle application.