PEAK OET 50/50 North American Vehicles Green: specs and approvals

Updated 22 October 2026 · Independent, sourced reference

Summary

PEAK OET 50/50 North American Vehicles Green coolant data, from PEAK's own source. PEAK ORIGINAL EQUIPMENT TECHNOLOGY Antifreeze + Coolant 50/50 Prediluted for North American Vehicles - GREEN is a 50/50 premix IAT ethylene glycol-based coolant listed by Old World Industries. The manufacturer lists 6 OEM or industry spec codes, including ESE-M97B44-A. Stated service life: up to 2 years or 50,000 miles.

Disclaimer: General information only, not professional advice. Always use the coolant specified in your vehicle owner's manual. Using the wrong coolant can damage an engine.
Independent and not affiliated. Coolant.com is not affiliated with, sponsored by or endorsed by any coolant or vehicle maker or retailer listed here, and we earn nothing from these links. Brand and spec names are used only to identify products. Every field comes from the manufacturer's own page or datasheet, checked 22 October 2026. "Not published" means we could not find it in that source. We record no prices.

Specifications

BrandPEAK
MakerOld World Industries
ProductPEAK ORIGINAL EQUIPMENT TECHNOLOGY Antifreeze + Coolant 50/50 Prediluted for North American Vehicles - GREEN
Part numbers (as published)NACB53
Sizes (as published)not published
ChemistryIAT
Base glycolEthylene glycol
ColourGreen
Premix or concentratePremix 50/50
OEM / industry specs listedESE-M97B44-A, GM 1899M, GM 1825M, MS-7170, TMC RP-302A, SAE J814
ASTM standards listedASTM D3306, ASTM D4985
Service life claimup to 2 years or 50,000 miles
Freeze point (as published)not published
Free-of claimsnitrite-free, amine-free
Datasheetdatasheet
Sourcemanufacturer page
Last checked22 October 2026

Specs and approvals listed by the manufacturer

  • Meets ESE-M97B44-A per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (Ford)
  • Meets GM 1899M per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (GM)
  • Meets GM 1825M per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (GM)
  • Meets MS-7170 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (Chrysler / FCA / Stellantis)
  • Meets TMC RP-302A per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (TMC (heavy-duty truck))
  • Meets SAE J814 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (SAE)
  • Meets ASTM D3306 per PEAK (industry test standard)
  • Meets ASTM D4985 per PEAK (industry test standard)

Manufacturer wording: PEAK® ORIGINAL EQUIPMENT TECHNOLOGY™ ANTIFREEZE + COOLANT for NORTH AMERICAN VEHICLES - GREEN is fully compatible with other green conventional coolants and meets the performance requirements of ASTM D3306 and D4985.

"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

Chrysler, Jeep & Dodge: Pre-2000 Ford, Lincoln & Mercury: Pre-2002 GM: Pre-1995

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

  • If your owner's manual calls for ESE-M97B44-A, PEAK lists that code for this product. Read the exact wording above, and confirm against your manual.
  • Chemistry is listed as IAT. Mixing different chemistries can shorten coolant life. See OAT vs HOAT vs IAT and use the mixing checker before topping up.
  • Colour is listed as Green. Colour is a dye, not a spec, so two coolants of the same colour can be different chemistries. See coolant colours explained.
  • Sold premixed: pour as supplied. Do not add water unless the label says to.
Always check your owner's manual first. Use the coolant spec printed in your owner's manual or service information. A listing here is the manufacturer's own claim (meets, exceeds, approved or recommended, worded as they put it). It is not our approval and not a fitment guarantee for your vehicle. If in doubt, ask your dealer or a qualified mechanic.

Where to buy

  • amazon.com (listed on the manufacturer page; the retailer blocks automated checks)
  • farmandfleet.com (listed on the manufacturer page; the retailer blocks automated checks)

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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Sources

  1. PEAK product page (status on 22 Oct 2026: 200)
  2. PEAK datasheet / spec sheet