Whole food vs oil, so olive vs olive oil. Olives is the full package (fat, fiber, protein). Olive oil is fat only. It's easy to over consume fats with oils. You can't link life expectancy with the consumption of a certain food. Consuming large amount of olive oil doesn't mean you are going to leave longer. Populations who don't consume olive oil, or little of it, have the same life expectancy. Based on the nutritional facts on the olive oil bottle in my pantry, 24L a year, thats 540 cal a day. If you add the oily fishes, nuts and seeds, avocados, olives,... that's a lot of daily fats. Unless on a high fat diet.

Do you know if the Greeks have always consumed that much olive oil, or is it a recent phenomenon? How much were they consuming 100 years ago for instance?