[UFO]

I do not believe this is an IDI, the TD engines like the AAZ are direct injected and would suffer using vegetable oil. A far better fossil-free fuel is biodiesel, I have been burning B100 in my direct injected diesels since 2007. I even get better mileage on it and blends than straight diesel.

I think I am wrong, the AAZ is indiect, which makes it more tolerant of vegetable oil. To me, this would only make sense on long commutes or trips where you can keep the engine hot for long periods of time as vegetable oil needs more heat than diesel or biodiesel to completely combust.