PEAK OET Extended Life Orange 50/50 Prediluted Antifreeze/Coolant

Per the TDS (12-27-23), PEAK OET Orange is designed for Chrysler, Jeep, Dodge, and Ram vehicles from 2013 and newer; Ford vehicles from 2011–2018; GM vehicles from 1995 and newer; and Lincoln vehicles from 2012–2017. It meets several named OEM spec codes including ASTM D3306, D4985, GMW3420, FCA/Chrysler MS-7170/MS-9769/MS-12106, and Ford WSS-M97B44-D/D2. However, Old World Industries (the manufacturer) includes an explicit disclaimer: 'This product has not been tested nor approved by Ford Motor Company, Fiat Chrysler Automobiles and General Motors LLC.' These are compatibility claims based on spec compliance, not formal OEM endorsements.

PEAK OET Orange uses OAT (organic acid technology) chemistry that is chemically equivalent to the DEX-COOL inhibitor system used in GM vehicles — same orange color, same phosphate-free/silicate-free OAT formula. The TDS states it meets GMW3420 (GM's coolant specification) for 1995 and newer GM vehicles. However, GM DEXCOOL is a registered trademark of GM LLC, and Old World Industries states the product has not been formally tested or approved by GM. In practice, the OAT chemistry is interchangeable with DEX-COOL for most GM applications, but owners who need formal OEM documentation should purchase the factory-branded fluid.

Yes. The Amazon listing specifically discloses: 'This item contains a bittering agent called Denatonium Benzoate.' SDS §3 confirms denatonium benzoate at 30–50 ppm. Denatonium benzoate is one of the most bitter substances known, added as a deterrent to incidental ingestion by pets and children. It does not change the H302 toxicity classification — ethylene glycol is still harmful if swallowed — but it meaningfully reduces the risk of voluntary consumption due to the product's otherwise mild smell.

H361 ('suspected of damaging fertility or the unborn child, Cat 2') appears in SDS §2 at the mixture level and is driven by two OAT corrosion inhibitor ingredients: potassium 2-ethylhexanoate and sodium 2-ethylhexanoate (both listed at 0–5% in SDS §3). This is a real SDS classification — not boilerplate. The H361 does not come from ethylene glycol itself. For handlers with reproductive health concerns, gloves during drain work and avoiding skin contact with concentrate are the relevant precautions derived from SDS §8.

PEAK guarantees 400,000 miles or 15 years when installed as a complete flush and fill (not top-off use). This claim reflects the OAT inhibitor chemistry, which degrades more slowly than silicate-based (IAT) formulas. That said, independent used-coolant analysis (VOA) data specifically corroborating the 400,000-mile figure is not publicly available in community sources (BITOG, etc.) as of May 2026. BITOG community guidance for OAT coolants generally supports 5-year / 150,000-mile intervals with confidence; the 15-year/400k claim is on the aggressive end. Test inhibitor reserve and pH at 5-year intervals.

No. Ethylene glycol coolant — used or fresh — must be collected and brought to a recycling program. Most auto parts stores (AutoZone, O'Reilly Auto Parts, Advance Auto Parts) accept used coolant at no charge. Drain or ground disposal is prohibited under the Clean Water Act in most US jurisdictions and poses documented harm to aquatic ecosystems. The sweet smell of ethylene glycol also attracts pets and wildlife, increasing the ingestion risk if spilled.