Motorcraft VC-5 Premium Antifreeze/Coolant, Green

This is the conventional green coolant meeting Ford specification ESE-M97B44-A, the older IAT (Inorganic Additive Technology) formula Ford used before its extended-life Gold and Yellow lines. It applies to Ford, Lincoln, and Mercury vehicles whose owner's manual or cooling system originally specified this exact spec, mostly older domestic-chemistry platforms. Check your owner's manual or the coolant fill cap before buying, since Ford has used several distinct coolant chemistries across model years.

No. Ford's own product literature says not to mix or top off a system originally filled with a different Motorcraft coolant line, since each uses a different corrosion-inhibitor chemistry. This conventional green IAT formula, the NOAT-based Gold line, and the newer Yellow line are three distinct fluids from the same factory brand, and mixing inhibitor systems can reduce corrosion protection rather than improve it. Use the coolant your specific vehicle was built to take.

Yes. This is a full-strength concentrate, not a ready-to-use product. Ford's label and SDS both describe it as requiring dilution with distilled water, typically 50/50, before it goes into the cooling system. Pouring it in neat gives a higher freeze point and worse heat transfer than a properly diluted mix, the opposite of what an antifreeze is for.

The DANGER signal word comes from a Category 1B reproductive-toxicity classification tied to the ethylene glycol base, on top of the standard harmful-if-swallowed classification most EG coolants carry and a respiratory-irritation classification from the concentrate. This is a real chemistry classification, not marketing language, and California's Proposition 65 warning for this product traces to the same ethylene glycol content.

Collect it in a sealed container and take it to an auto parts store that accepts used coolant for recycling; most major chains do this at no charge. Never drain spent coolant onto the ground or into a storm sewer. Ethylene glycol has a sweet taste that attracts pets and children, so keep both fresh and spent coolant secured and out of reach.

The listing for Motorcraft VC-5 Premium Antifreeze/Coolant, Green carries a California Prop 65 warning. Motorcraft VC-5 Premium Antifreeze/Coolant, Green 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.