I can't speak for all Europe, but here in Austria truffle oil has small pieces of truffle in it. Of course, those do nothing, as the chemicals found in truffle

I can't speak for all Europe, but here in Austria truffle oil has small pieces of truffle in it. Of course, those do nothing, as the chemicals found in truffles are, to a first approximation not soluble in oil. It's just the same chemical crap with some placebo truffle in it. Friends don't let friends buy truffle oil.