CarCareTruth Score
Decent, but it's tough on the environment.
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Prices may varyHealth score is for adult use as intended, per the manufacturer's SDS. It does not model child ingestion, accidental spill cleanup, or off-label use. See the safety panel below for full hazard classification, and /disclaimer for the full editorial scope.
GHS hazard codes are quoted from the manufacturer’s Safety Data Sheet. PPE tiers below translate those codes and the listed ingredient chemistry; they are not CarCareTruth recommendations.
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Only when: splash risk
Translated from the manufacturer’s Safety Data Sheet, Section 8
SDS Section 8 calls for eye/face protection. Section 11 explicitly states the mixture is not classified as seriously damaging to the eye or as an eye irritant, so this is a splash-contact precaution during pour-fill and drain work, not a mixture-level eye hazard.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Only when: prolonged use
Translated from the manufacturer’s Safety Data Sheet, Section 8
H373 (STOT RE 2, may cause organ damage through prolonged or repeated exposure) is classified at mixture level in SDS §2 · sodium nitrite and ethylene glycol both have chronic systemic-exposure pathways via skin absorption. SDS §8 specifies chemical-resistant gloves per EN 374, with reuse hygiene language indicating repeated-exposure framing. Trigger: drain work or extended contact with the product.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
Only when: in enclosed space
Translated from the manufacturer’s Safety Data Sheet, Section 8
SDS Section 8 calls for respiratory protection in case of inadequate ventilation. The mixture carries no inhalation hazard code at Section 2, and ethylene glycol's vapor pressure (100 Pa at 51.1°C) is very low at room temperature, so this is a ventilation-dependent precaution rather than a routine requirement for normal pour-fill use.
U.S. regulatory standard
29 CFR 1910.1000; 1910.1200
“Each employer shall assure that no employee is exposed [in excess of the PEL]…”
OSHA standards apply to workplaces. Cited here as the U.S. reference threshold for the underlying hazard class.
CarCareTruth publishes the cited sources verbatim and does not advise what action a user should take. Consult the full SDS before use.
No PPE specified in published sources for ventilation. Absence does not imply “not needed” — consult the full Safety Data Sheet.
PPE tiers translate the manufacturer’s SDS and U.S. regulatory standards. Not professional safety advice. How we report safety.
Scope of these PPE tiers. The tiers on this page translate the product's Safety Data Sheet where one is published, plus its ingredient chemistry, into a comparable rating. They describe a formulation, not a situation: a tier is not a safety determination for any specific user, task, quantity, or environment. The manufacturer's label and use instructions govern how the product is handled. Where the product is used at work, the employer's PPE program and hazard assessment under 29 CFR 1910.132 decide what protection is selected, not this page.
No warranties. CarCareTruth makes no warranties, express or implied, and expressly disclaims the implied warranties of merchantability and fitness for a particular purpose.
This product ranks #11 of 21 in Coolant / Antifreeze.Three above it ↓
Last reviewed May 26, 2026
TL;DR Universal pre-diluted EG coolant with a NOAT inhibitor package (sodium nitrite plus sodium tolytriazole) and a 5-year / 150,000-mile drain claim. Meets ASTM D3306, D6210, D4985, BS 6580, and KS K2234 performance standards; no named OEM approval document numbers are cited on the label or any publicly hosted technical data sheet. Ethylene glycol base · the SDS carries chronic-endpoint H-codes (H351 suspected carcinogen, H361fd suspected reproductive toxin, H373 chronic organ toxicity) at mixture level driven by the nitrite chemistry, and the product is on California Proposition 65 for ethylene glycol developmental toxicity.
Mishimoto Liquid Chill OE Coolant (Yellow) is a pre-diluted 50/50 ethylene-glycol coolant positioned as a universal top-off and flush product. The NOAT inhibitor package · sodium nitrite plus sodium tolytriazole · supports the manufacturer-claimed 5-year / 150,000-mile drain interval and is consistent with the heavy-duty ASTM D6210 specification the product claims to meet. No independent used-coolant analysis data is available to confirm the drain interval. The label-stated protection range is the category standard −34°F to +265°F at 50/50. Ethylene glycol base; pre-diluted with water and shipped ready to use.
Best for owners of trucks, SUVs, and mixed-fleet vehicles who want a single universal coolant SKU compatible with multiple OEM coolant colors, particularly when the existing coolant chemistry is unknown or when a heavy-duty D6210-compliant formulation is desired. Skip this if your owner's manual specifies a named OEM coolant by document number · Mishimoto Liquid Chill carries no published OEM document endorsements and the wrong inhibitor package can cause issues in OEM-specific systems. Also skip for newer European vehicles (VW, BMW, Audi, Mercedes) that specify nitrite-free Si-OAT chemistry · Liquid Chill's sodium-nitrite content is not best practice in those applications. Buyers prioritizing a propylene-glycol formula for households with pets or children should choose a PG-based product instead.
Signal word: WARNING, with pictogram GHS08 (chronic / target-organ) only · no GHS07 because the SDS Section 11 mixture-additivity calculation does not classify the product as acutely toxic, eye irritant, or skin irritant despite individual ingredient classifications at sub-1% concentrations. Three chronic-endpoint H-codes are classified at mixture level: H351 (suspected of causing cancer, Cat 2), H361fd (suspected of damaging fertility or the unborn child, Cat 2), and H373 (may cause damage to organs through prolonged or repeated exposure, Cat 2). These are Category 2 "suspected" classifications based on the sodium-nitrite and sodium-tolytriazole inhibitor chemistry · they are real classifications that warrant prolonged-exposure precautions, not the kind of acute warning that applies on first contact. The product also carries a California Proposition 65 warning for ethylene glycol (CAS 107-21-1, developmental toxicity). SDS Section 8 specifies chemical-resistant gloves for prolonged or repeated skin contact during drain work, eye/face protection as a splash-contact precaution, and respiratory protection if ventilation is inadequate; none of these are backed by a mixture-level H-code (no eye-irritant, skin-irritant, or inhalation classification per Section 11), so normal pour-fill use at ambient temperature carries a low bar, but the SDS-named gear is still worth having on hand for drain work in a closed garage. Collect spent coolant for recycling at auto parts stores (AutoZone, O'Reilly, Advance Auto) · SDS Section 13 explicitly prohibits drain or ground disposal. Although SDS Section 12 states the mixture is not classified as hazardous to the aquatic environment, the ethylene glycol base still earns the environment score the 4/10 EG category hard ceiling.
Mishimoto markets Liquid Chill Universal Yellow as compatible with all OEM coolant types and lists ASTM D3306, ASTM D6210, ASTM D4985, BS 6580, and KS K 2234 performance standards. No named OEM approval document numbers (GM DEXOS, Ford WSS-M97B44-D, VW TL 774-G, Honda HES SO-277, Toyota SLLC, BMW GS 94000) are cited on the label, the Mishimoto product page, or any publicly hosted technical data sheet as of May 2026. The inhibitor package contains sodium nitrite · appropriate for the D6210 heavy-duty diesel claim, but nitrite-containing coolant is not best practice in European OEM systems (BMW, VW/Audi, Mercedes) that specify nitrite-free Si-OAT chemistry. Owners with strict OEM coolant specifications should verify the correct specification from their owner's manual before using a universal formula.
NOAT · Nitrited Organic Acid Technology. SDS Section 3 lists sodium nitrite (CAS 7632-00-0) and sodium tolytriazole (CAS 64665-57-2) as the inhibitor ingredients alongside ethylene glycol. Sodium nitrite is the diagnostic NOAT marker · common in heavy-duty diesel coolants and consistent with the product's ASTM D6210 (heavy-duty) compliance claim. Sodium tolytriazole is a yellow-metal corrosion inhibitor that protects copper and brass cooling system components. NOAT is distinct from OAT (organic-acid only, no nitrite or silicate) and HOAT (hybrid OAT with silicate).
Ethylene glycol (EG). SDS Section 3 lists ethylene glycol at 50-<75% by weight (the lower fraction reflects the 50/50 pre-diluted formulation). The SDS does not carry an H302 'harmful if swallowed' classification at mixture level · Mishimoto's Section 11 additivity calculation places the mixture in Cat 5 (not classified as acutely toxic), which is unusual for an EG coolant and reflects an honest mixture-level calculation rather than carrying over the standalone EG ingredient classification. The product still carries a California Proposition 65 warning for ethylene glycol developmental toxicity, and the chronic-endpoint H-codes H351 (suspected carcinogen), H361fd (suspected reproductive toxin), and H373 (chronic organ toxicity) apply at mixture level.
The three chronic-endpoint codes come from the NOAT inhibitor package, not from ethylene glycol itself. Sodium nitrite is classified as a suspected carcinogen (H351) under ECHA / OSHA classification rules · the carcinogenicity concern is based on nitrosamine formation potential under prolonged exposure scenarios. Sodium tolytriazole carries a Repr. 2 (H361) classification at the ingredient level, and the combination drives the mixture-level H361fd. H373 (chronic target-organ toxicity) applies to both nitrite and tolytriazole at chronic exposure thresholds. These are Category 2 'suspected' classifications, not Category 1 'known' · but they justify the published_flag designation on the CarCareTruth product page and the warning detail in the Safety section.
No. SDS Section 13 is explicit: 'Do not empty into drains. Avoid release to the environment.' 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. Storm drain or ground disposal is prohibited under the Clean Water Act in most US jurisdictions, and the sweet smell of ethylene glycol attracts animals, increasing the risk of ingestion if spilled. Although SDS Section 12 states this mixture is not classified as hazardous to the aquatic environment at the mixture level, the disposal-collection requirement still applies because of the ethylene glycol base.
The listing for Mishimoto Liquid Chill OE Coolant, Yellow, Universal, Premixed 50/50, 1 Gallon carries a California Prop 65 warning. Mishimoto Liquid Chill OE Coolant, Yellow, Universal, Premixed 50/50, 1 Gallon is a working automotive fluid rather than a passive part, so the warning points at the formulation itself. The manufacturer's Safety Data Sheet is the primary source for what is in it: the hazard classification and the PPE tiers on this page are translated from that sheet, and the full SDS is linked from the safety panel. California requires the warning whenever exposure to any of roughly 900 listed substances is possible. It does not name which substance applies to a given product, and it states no dose or risk level, so it is not on its own a measure of how hazardous this fluid is in normal use.
Marketing copy from Mishimoto, via Amazon. Not editorial.
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