Castrol Heavy-Duty Transmission Fluid

Brand: Castrol | Part #OIL-668B1F

Category: Oil & Fluids > Transmission Fluid

The Castrol Heavy-Duty Transmission Fluid (P/N OIL-668B1F) is a direct-fit Transmission Fluid for the vehicles listed in the fitment section. Compatible with most factory-fill chemistries — top-off and full drain-and-refill use cases both supported. Sourced from Castrol, a recognized supplier in the aftermarket auto parts channel. Part number OIL-668B1F is the manufacturer reference — match it against your old part or VIN-based lookup to confirm you have the right unit. Confirmed fitment on 2011–2024 Mercedes-Benz, Mazda, Ford including EQE, CX-90, Expedition, Mustang. Use the year/make/model selector above to verify your exact configuration before checkout. Same- or next-business-day handling on in-stock orders. Free US shipping over $75 — no surprise oversized fees on this item. Backed by a 90-day return window — if the part doesn't fit or the wrong unit was shipped, send it back for a full refund.

Price: $30.99 | In stock — ships within 1-2 business days. Free shipping on orders over $75.