Liqui Moly Top Tec ATF 1800 automatic transmission fluid, 5-litre canister. The bulk-volume option for complete ZF 8HP gearbox flush services in BMW X3 F25, F30 3-Series, F10 5-Series, F15 X5, and other ZF 8HP-equipped vehicles. ATF VI specification synthetic fluid carrying full BMW M-1375.4 approval. At €13.50 per litre vs €15.49 per litre for the 1L bottle — buying the 5L canister saves ~13% per litre, ideal for workshops or full-fluid-change services. Total ZF 8HP gearbox fill quantity: 8.5 litres (one 5L canister + one 5L canister = full flush capacity).