Summary
Prestone Heavy Duty 50/50 coolant data, from Prestone's own source. Prestone Heavy Duty Antifreeze + Coolant 50/50 Prediluted is a 50/50 premix OAT coolant listed by Prestone. The manufacturer's page we checked does not list OEM spec codes. Stated service life: up to 600,000 miles/12,000 hours.
What to buy
We have not verified an Amazon listing for this product. See the retailers the manufacturer names.
Where to buyConfirm the specification in your owner’s manual before buying. Product examples are not a fitment guarantee.
Specifications
| Brand | Prestone |
|---|---|
| Maker | Prestone |
| Product | Prestone Heavy Duty Antifreeze + Coolant 50/50 Prediluted |
| Part numbers (as published) | AF5200 |
| Chemistry | OAT |
| Premix or concentrate | Premix 50/50 |
| Service life claim | up to 600,000 miles/12,000 hours |
| Free-of claims | nitrite-free |
| Not published by the maker | Sizes, Base glycol, Colour, OEM / industry specs, ASTM standards, Freeze point, Datasheet. Check the product label or ask the manufacturer. |
| Source | manufacturer page |
| Last checked | 22 October 2026 |
Specs and approvals listed by the manufacturer
No OEM approval or spec codes are published on the source we checked. That does not mean the product fails any spec. It means the manufacturer did not list one there. Check the product label or ask the manufacturer.
Compatibility notes
- Chemistry is listed as OAT. Mixing different chemistries can shorten coolant life. See OAT vs HOAT vs IAT and use the mixing checker before topping up.
- Sold premixed: pour as supplied. Do not add water unless the label says to.
Where to buy
- prestone.com (where to buy) (link checked 22 Oct 2026)
These links come from the manufacturer's own product page or official parts store. We do not show prices because they change and vary by store. Check that the part number and size match before you buy.
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See every Prestone product we list, with the chemistries and spec codes the maker names, on the Prestone coolant brand page.
See all Prestone coolants, coolants by brand or coolant by car make.
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Next step
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Find my car coolantWhere to buy coolantHow we source this page
- Facts come from manufacturer pages, datasheets, owner's manuals and standards bodies, linked under Sources.
- We do not test products, and no brand pays to be listed or ranked. Advertising and affiliate links are labelled and never change the data.
- Anything we could not find is marked "not published" rather than guessed. Spotted an error? Tell us.