Zerex Asian Vehicle Red 50/50 Prediluted Antifreeze/Coolant

Per the Amazon listing and back label, Zerex Asian Vehicle Red is formulated to replace the OEM fluid in Asian-make vehicles that call for a red, silicate-free, borate-free HOAT antifreeze — Toyota, Lexus, Scion, and others. The product also lists OEM specifications meeting Hyundai/KIA MS 591-08, Mitsubishi ES-64217, and Ford WSS-M97B55-A (the Ford spec used for a limited set of models that called for the red Asian-style HOAT). It also meets JIS K 2234-1994, ASTM D3306, ASTM D4985, and Federal Specification A-A-870A. Always verify against your vehicle's owner's manual before switching coolants — using the wrong coolant chemistry can cause corrosion.

Zerex Asian Vehicle Red is a phosphate-HOAT formulation that targets the same Toyota, Lexus, and Scion applications as Toyota SLLC and the AISIN ACT-002 cross-reference. Community discussion on BobIsTheOilGuy treats these as workable equivalents for most North American Toyota applications. They are not formally OEM-equivalent — Toyota SLLC and AISIN ACT-002 are the OEM-branded fluids, and Zerex Asian Red is a spec-meeting aftermarket alternative. For warranty-period vehicles where OEM fluid is specified, use the Toyota-branded coolant; for out-of-warranty applications, Zerex Asian Red is a widely accepted drop-in for the Asian-vehicle red HOAT category.

No — this is a 50/50 prediluted ready-to-use coolant. Pour directly into the cooling system per the manufacturer's fill instructions. The product as supplied contains roughly equal parts ethylene glycol and water, delivering protection to approximately −34°F. A separate full-strength concentrate variant of Zerex Asian Vehicle Red exists for buyers who want to mix their own dilution ratio for severe-climate use — but the 1-gallon bottle covered on this page is the pre-diluted product.

The SDS classifies this product as H302 (harmful if swallowed, Acute Toxicity Category 4) and H373 (may cause damage to organs — specifically kidney and liver — through prolonged or repeated exposure if swallowed). Ethylene glycol is the hazardous ingredient and is well-documented as being attractive to pets due to its sweet taste, and it remains acutely toxic to small animals and children even at small ingested volumes. The back-of-bottle label carries a California Proposition 65 warning for ethylene glycol. The SDS does not document the addition of a bittering agent (denatonium benzoate) the way some other Zerex variants do. Store secured from pets and children; spent coolant must be collected for recycling, not left in drip pans or puddles.

Per the Amazon listing, this is a silicate-free, borate-free Hybrid Organic Acid Technology (HOAT) coolant with a phosphate additive — sometimes called P-HOAT, the standard chemistry used in Asian OEM coolants where European and American HOATs would use silicate as the secondary inhibitor. The label states a 5-year / 150,000-mile service interval. No independent used-coolant analysis (VOA) at the full claimed interval is publicly available — the interval is based on the inhibitor chemistry and is consistent with HOAT service-life expectations in the Asian-vehicle application.

Collect spent coolant in a sealed container — do not drain to the ground, storm sewer, or household drain. Ethylene glycol is attractive to animals due to its sweet taste and is harmful if ingested. Most auto parts stores (AutoZone, O'Reilly, Advance Auto Parts) accept used coolant for recycling at no charge. Check your local store's policy before arrival.