MarkB_MI
Well-known Member
- Location
- Motown USA
The other day I was in the auto parts store and noticed that the "old" Prestone antifreeze was no longer on the shelf. You know, the green stuff with the famous "silicone/silicate" additives. The closest thing they have is <a href="https://prestone.com/products?detail=AF2000">Prestone "All Vehicles"</a>. When I got home, I checked the jug of Prestone I bought last year for my tractor and was surprised to find it is also the "All Vehicles" Prestone, NOT the old stuff. This antifreeze is pale green in color, not nearly as dark as the old Prestone. Since it says it's compatible with "all" other antifreeze and doesn't say anything about silicones or silicates, I have to assume it uses organic additive technology (OAT). ("Organic" means "carbon-based", not that it's somehow good for the environment.)
There's no mention of the old Prestone on their website, either, so it sounds like they've discontinued it. They do list something called <a href="https://prestone.com/products?detail=AF3200">Prime by Prestone "Conventional Green"</a>, which seems like it must be similar to the old Prestone. I have no idea where you would buy it, if you wanted to.
So, my point is, it seems the concerns about mixing new OAT antifreeze with the old stuff are now moot, since the old NOAT antifreeze is for practical purposes no longer available. Unless you drain and flush out your old green antifreeze when you add coolant, you WILL BE MIXING ANTIFREEZE TYPES!
There's no mention of the old Prestone on their website, either, so it sounds like they've discontinued it. They do list something called <a href="https://prestone.com/products?detail=AF3200">Prime by Prestone "Conventional Green"</a>, which seems like it must be similar to the old Prestone. I have no idea where you would buy it, if you wanted to.
So, my point is, it seems the concerns about mixing new OAT antifreeze with the old stuff are now moot, since the old NOAT antifreeze is for practical purposes no longer available. Unless you drain and flush out your old green antifreeze when you add coolant, you WILL BE MIXING ANTIFREEZE TYPES!
