You may want the primary source, Öko-Test [1], here. Your two links are really unclear about what they mean. It's evident from the Öko-Test article that they a

You may want the primary source, Öko-Test [1], here. Your two links are really unclear about what they mean. It's evident from the Öko-Test article that they are referring to contamination ("residue" of mineral oil, as they call it). Unfortunately, the published results are behind a paywall, and they don't explain in the article just how significant the contamination is. For all we know, it could be an insignificant amount. It's also unclear if they tested any meat products for similar types of contamination. [1] https://www.oekotest.de/essen-trinken/Vegane-Burger-im-Test-Knapp-die-Haelfte-mit-Mineraloel-verunreinigt_10922_1.html https://www.oekotest.de/essen-trinken/Vegane-Burger-im-Test-...