Here in Taiwan fake oils are alleged to be a significant risk (Agip gets mentioned) but I've heard of it happening with Ebay sales in the UK.
My tactic is to buy from large supermarkets (RT-MART and Carrefour here. Costco no longer stock anything I would buy, having gone entirely fashionably skinny), who hopefully have some control over the supply chain, and not to buy expensive oil, which is more likely to be targeted.
Expensive oil just isn't worth the risk.
Edited by edlithgow on 13/07/2019 at 04:09
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