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Yeah, why on earth is the SF97 issued to IP/GP instead of the person who bought the truck? If they have to do the whole OH title thing, does that mean you'll be in for another few months of waiting on GP?

Holy cow, I hadn't even considered that this would be an issue. Now I wonder how Utah is going to handle it...

Haha, yes.. there is just a *BIT* of a difference between a GEP-built light duty engine and a REAL 2-stroke Detroit Diesel but I still found some reassurance that it would be compatible with the iron blocks and heads used in those kinds of heavy duty diesel engines. Some of the other available...

So I finally made up my mind and bought some jugs of Zerex G05. I can't find anyone saying anything bad about it online and it actually seems to be pretty highly recommended for many similar applications. The icing on the cake was the back of the bottle actually says it is formulated for...

Godspeed!

Yes it is all extremely confusing for me too. I saw a few comments about distilled water but they are nonsense that are absurd from a chemistry stand-point. Heck, look at the ingredients for the 50/50 mixes at the store and you'll see the water that is used is distilled. One thing I'm pretty...

I'm going to go with either plain old green IAT coolant which seems to only be available in generic brands or use Zerex G05 which is an HOAT coolant that many people seem to swear by. The Zerex stuff seems to have a lot of the corrosion additives that would be beneficial in an iron block engine...

Yuppp I read that last night. Really makes me want to flush out the Prestone stuff and use something else.

I think this is the way I am going to end up going. I don't particularly want/need the longer lifetime of the more "fancy" coolants because I believe flushing and replacing coolant every 2-3 years is best for longevity of the cooling system. Plus, the old green stuff has been in there for the...

I guess that must be it. I work with a team of middle-aged professionals that come to work every day but my wife works with a bunch of younger 20-somethings and they are calling out and quitting all the dang time. Today one of them called her to say she woke up and just didn't feel like she...

That's almost worse than not having any kind of hope of getting it any time soon. Almost... haha I am not sure what is going on with shipping companies lately. Next day shipping on Amazon has turned in to 3-5 day shipping for most things. I don't think its even a COVID thing either. It feels...

Yes, ~3.5 gallons of straight coolant mixed with ~3.5 gallons of distilled water. Definitely not cheap to be swapping out all the time.

You are correct, they are both OAT-based coolants (yes, it is confusing as hell). Whether that is a good thing, bad thing or neutral thing, is still unclear to me. After doing much research today, there seems to be about a million variables that determine the best coolant for any given cooling...

In the article I linked it says this: "Borate is an additive that reduces acidity (pH) in inorganic coolants. You would find this additive in many IAT coolants, but not so many OAT or HOAT coolants. It’s because many OAT and HOAT coolants have to maintain a different pH. The presence of borate...

I think my biggest concern would be the cast iron block corroding more quickly with OAT than it would with IAT. I know when I drained out the old green IAT coolant, it was 100% clean which was amazing to me. There wasn't a single flake of rust or crud that came out even though the truck has been...

We both might be completely fine with what we have in our trucks since we drained all the old OEM IAT coolant out before putting the new OAT stuff in. Or, it could substantially reduce the life of some/many components. I guess that is the million dollar question with the extremely elusive...

That's what makes this topic more complicated than it might seem at first glance and I guess why it hasn't been answered definitively anywhere that I have been able to find. I found some article earlier that said Prestone sells the Dex-cool branded coolant separately and that the only...

The STP data sheet has the answer to the last question: "STP® Heavy Duty Nitrite Free Extended Life Antifreeze/Coolant is an Organic Acid Technology (OAT) formulation." So it would seem that is an OAT based coolant.

That's where the marketing mumbo-jumbo gets ya. The back of the bottle says its compatible with ALL types of coolant which is why I was initially fine with using it. However, based on the limited research I have done, that almost by the very nature of the chemistry involved, means that it isn't...

Just to be clear, you are saying you would not use this coolant because it is compatible with OAT coolants and therefore not ideal for a cooling system originally designed for silicate based coolant?