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5 Castrol deals are available from: Amazon stores, starting from £8.34. The biggest discount we found is 6% on Castrol Transmax Manual Transaxle Fluid 75W-90 1L (Pack of 3) at Amazon. The lowest price we found is £8.34 while the highest is £56.16. Prices for the best Castrol deals average at £24.50. Last updated on September 11, 2026. We scanned these quality online stores and more to deliver you with the best offers online available for Castrol.
