I've been making my own mayonnaise for years, but since switching to a more ancestrally-appropriate diet, I've found that making mayo with olive oil doesn't quite do it for me. I want my mayonnaise to taste like Duke's, not like Il Duce's.
I've heard a lot of different options from folks, but am not really sure what to try next. So, those of you who make your own mayo, what oil do you use, and why?