Heart disease and diabetes are very prevalent in my family, so I generally try to keep my diet in the direction of the Esselstyn guidelines. I'm currently not entirely strict about it, it's a work in progress.

Admittedly the science of added oil vs no oil is very much an open question still, and much more studies need to be done to see if Esselstyn's relatively extreme restrictions truly make a real difference. Still, it's a safe diet, it's designed by heart specialist specifically for treating heart disease, and from what I've seen it appears to be the most promising option out there. Also, if it ever does become proven that atherosclerosis can be reversed - particularly through lifestyle interventions - I think that's really cool and exciting.

As a sidenote, for general populations, Harvard currently has the strongest evidence supporting the idea that a little oil is fine, as long as you're choosing the right ones.