This is actually old news, about ten years, but it’s new if you weren’t aware. Search on brave browser “fake olive oil” “best brands” etc. It’s getting harder to find this information because of censorship. YouTube might be a good source. Could be old videos explaining why the oil is fake. I’ve read the trees in Italy are dying, & the mafia is diluting for profit. I believe the major food companies that sell the oil in the grocery are just seeking a profit. After all we already know USA gov isn’t concerned about our well being. They’ve been tainting our food for decades, if not a century. I believe it all started when canned, frozen & box food came out. Year by year the ingredients got worse. I prefer the taste of olive oil from Greece or Israel. I’ve heard Portugal has great oil. Lately I’ve been buying California Olive Ranch. I did some research and that brand kept coming up most reviews. If you are near a large metropolitan area Home Goods, Marshall’s & TJ Maxx can be good sources for oils, salt, spices, etc. Double check the expiration date, bottle should be dark or metal. Look up the olive company or ranch online. It’s always been expensive and getting worse. I like a blend of coconut, olive & sunflower oil. There’s some small companies in the states making this. Probably sunflower growers. If you are baking and it calls for vegetable oil I use avocado because I don’t taste the olive oil. Another tip with baking ditch the Pam! Learn to flour a pan like the old timers did. I melt butter when baking brownies or muffins. So far I haven’t needed flour. Also lard crisco isn’t what it was in the 70s or before. It hasn’t been fat from an animal in a long time! Look up Canola oil connections with American Heart Association. This is why your doctor suggests canola oil. Especially if you get the heart doc.

https://www.motherjones.com/environment/2016/08/olive-oil-fake-larry-olmsted-food-fraud-usda/

https://camillestyles.com/food/olive-oil-fraud/