The invention provides a method for preparing fuel components from waste pyrolysis oil, comprising:



providing a waste pyrolysis oil, comprising as the major part plastic pyrolysis oil and/or tyre pyrolysis oil, and comprising impurities in the form of chlorine, nitrogen, sulphur, and optionally silicone or bromide;
purifying the waste pyrolysis oil by subjecting it to a hydrothermal treatment with water or alkaline water;
separating the hydrothermally treated waste pyrolysis oil from the aqueous phase; preparing a hydroprocessing feed from the hydrothermally treated waste pyrolysis oil, optionally in mixture with one or more feed(s) of oxygen-containing biological oils having impurities of chlorine and silicon;
hydroprocessing the hydroprocessing feed catalytically with hydrogen to cause hydrogenation, and optionally one or more of hydrodeoxygenation, hydrodesulfurisation, hydrodenitrification, hydrodechlorination, hydrodearomatization, and hydroisomerisation;
recovering a hydrocarbon fraction boiling in the liquid fuel range.