![SMARTflash - Cylinder Deactivation Calibration [Mk8.5 Fiesta ST] Graphics with our recommended Liqui Moly](https://cdn.shopify.com/s/files/1/0367/2621/products/m235_vde_03609d6d-f78e-4f78-b226-f42fa1c581a3.png?v=1677686114)
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with our recommended Liqui Moly oil - which meets or exceeds Ford's standards
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ensures cleanliness in the fuel system and injection nozzles
0L Duratec engines
SMARTflash - Cylinder Deactivation Calibration [Mk8.5 Fiesta ST] Graphics with our recommended Liqui MolyThe 1. 5 litre Dragon engine fitted to the Mk8. 5 (facelift) Fiesta ST utilises a VDE (Variable Displacement Engine) setup which seamlessly deactivates one cylinder when cruising, or on coast down to help with increasing fuel efficiency and reducing Co2 output. However, eagle eared owners can pick up the somewhat strange noise this activation causes and in particular, when replacing or upgrading the exhaust system, this audible change becomes very
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