Summary
PEAK Universal 50/50 coolant data, from PEAK's own source. PEAK Universal 50/50 Prediluted Antifreeze + Coolant is a 50/50 premix ethylene glycol-based coolant listed by Old World Industries. The manufacturer's page we checked does not list OEM spec codes. Stated service life: 10+ Years / 300,000 Miles.
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 | PEAK |
|---|---|
| Maker | Old World Industries |
| Product | PEAK Universal 50/50 Prediluted Antifreeze + Coolant |
| Part numbers (as published) | PKU5D3 |
| Base glycol | Ethylene glycol |
| Premix or concentrate | Premix 50/50 |
| ASTM standards listed | ASTM D3306, ASTM D4985 |
| Service life claim | 10+ Years / 300,000 Miles |
| Freeze point (as published) | -34°F |
| Free-of claims | nitrite-free, borate-free, silicate-free, phosphate-free, amine-free |
| Datasheet | datasheet |
| Not published by the maker | Sizes, Chemistry, Colour, OEM / industry specs. Check the product label or ask the manufacturer. |
| Source | manufacturer page |
| Last checked | 22 October 2026 |
Specs and approvals listed by the manufacturer
- Meets ASTM D3306 per PEAK (industry test standard)
- Meets ASTM D4985 per PEAK (industry test standard)
Manufacturer wording: Meets European phosphate-free and Japanese silicate-free requirements
"Meets X per manufacturer" is our shorthand for any of the manufacturer's own phrases: meets, meets or exceeds, approved, or recommended for applications requiring. It is the manufacturer's claim, not an approval by Coolant.com or by the vehicle maker. Codes are copied as published. Some sources list codes for compatibility rather than formal approval. The wording above shows which.
What the manufacturer says it is for
PEAK® Universal Antifreeze + Coolant is designed for use in all North American, Asian and European passenger cars, SUVs, motorcycles and light/medium duty trucks, regardless of make, model or year.
Quoted from the manufacturer's page. Coolant.com has not verified fitment for any vehicle, and a listed make or year range is the manufacturer's statement, not ours.
Compatibility notes
- Sold premixed: pour as supplied. Do not add water unless the label says to.
Where to buy
We did not find a retailer link on the manufacturer's page that we could check. Try the manufacturer's own site: PEAK product page.
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- 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.