The 2018 Ford Transit uses a long‑life ethylene glycol–based coolant that meets Ford’s specific specifications. The recommended option is Motorcraft long‑life coolant in a 50/50 premixed formulation, or an equivalent certified to Ford standards WSS-M97B44-D (and related specifications such as WSS-M97B51-A1/A2).
In practice, you should use a coolant that explicitly states it meets Ford’s WSS-M97B44-D or WSS-M97B51-A1/A2 certification. Do not mix non‑Ford coolants or older formulations with the proper Ford coolant, and always follow the 50/50 mix unless the product is already premixed.
Coolant specifications and what to buy
To help you shop, here are common options that meet Ford specifications for the Transit. The list shows products you can typically find at auto parts stores or dealerships that are compatible with the 2018 Transit’s cooling system.
- Motorcraft Premium Engine Coolant Extended Life (50/50 premixed) — a long‑life coolant that meets Ford specification WSS‑M97B44‑D and is widely used as the standard repair/replacement coolant.
- Motorcraft Engine Coolant Concentrate — to be diluted with distilled water to 50/50, designed to meet Ford specifications WSS‑M97B44‑D (and related Ford coolant specs).
- Any third‑party coolant labeled as meeting Ford specifications WSS‑M97B44‑D or WSS‑M97B51‑A1/A2 — ensure the label confirms the Ford spec before use.
After you choose a coolant, ensure you maintain the correct 50/50 concentration (unless you’re using premixed coolant). Using the wrong mix or an incompatible product can affect cooling performance and engine protection.
Regional considerations
Labeling and availability can vary by region. In North America, Ford’s WSS‑M97B51‑A1/A2 or WSS‑M97B44‑D specifications are commonly referenced for modern Ford vehicles, including the Transit. In Europe and other regions, the same Ford specifications apply, but product packaging may differ. Always check the bottle for the Ford specification and cross‑reference it with your vehicle’s manual.
If in doubt, consult your local Ford dealer or a trusted shop, and bring your vehicle’s owner’s manual or the radiator cap/overflow bottle label to confirm the exact specification required for your 2018 Transit.
Maintenance tips and topping up
Keep the cooling system in good condition by performing regular checks. When topping up or replacing coolant, use only the coolant type specified for your vehicle and mix it to the correct concentration. Do not mix different coolant types or brands unless they both explicitly state compatibility and Ford specification alignment. If you’re unsure, have a professional service the cooling system to avoid potential engine damage.
Summary
The 2018 Ford Transit requires a long‑life, ethylene glycol–based coolant that meets Ford specifications WSS‑M97B44‑D or WSS‑M97B51‑A1/A2. The easiest and most reliable option is Motorcraft Premium Engine Coolant (50/50 premixed), or Motorcraft Concentrate diluted to 50/50, or a certified equivalent that clearly states Ford compatibility. Always verify the labeling and maintain the correct 50/50 mixture for optimal cooling system performance.