It is really surprising, not with the people who buy oils, but with the manufacturers.
Ignorance in all its glory.
This specific oil is not only NOT fully Synthetic, but it is not even a regular semi-synthetic. The base of this oil is Group 3, and it is made with the method of hydrocracking, with some additives that all companies use. Now someone will say why they write fully synthetic. Because simply their legislation allows them to write it, and if someone tells them during an inspection that it is essentially a semi-synthetic and not fully synthetic, they will say that it has synthetic additives? All additives are synthetic anyway. In short, anyone who knows how to download and read the safety data of oils will understand how much of a scam it is. In fact, this specific oil in the safety data states Paraffinic, meaning a base made from paraffin. Meaning a base made from petroleum with no trace of synthetic percentage. When oils have some percentage of synthetic, they write Polyolefin and Poluamine. So this specific oil is just a simple oil and nothing else, like many other oils that claim to be fully synthetic or 100% synthetic, and of course they are not!
Especially the fully synthetic oils based on PAO that have 30%, 40%, and 50% synthetic base do not cost 8 and 10€. Learn to read the safety data of oils. Most oils that claim to be fully synthetic are not. At best, they are semi-synthetic. So most people buy an oil thinking they have bought a fully synthetic one, but they have simply bought a regular semi-synthetic oil. But their psychology makes them think they have gotten a great oil