My grandpa is 96 years old and never owned a car. He rides his bike a few miles almost daily. His diet includes a lot of pork, some fish, veggies, and a crazy amount of bread. He has been lean all his life. He worked hard in the farm, most of his food was from it. So no proceeded food, a lot of physical activities and low stress. Genetics may have something to do with it, my ancestors old passed away around 100 years of age, but the lifestyle is a major factor.