What do you refuel as a frequent driver? Diesel, vegetable oil, LPG, etc.?

Hello together, I drive about 60000km in the year and currently drive a 320d and of course fuel diesel. At the moment every Beninzer is on the LPG Tripp (that’s how I put it), but that’s more expensive for me than diesel (according to ADAC car cost calculator for example). With the diesel there is actually only the conversion to plant oil, but you can hear about it and read nothing more. Is that so uninteresting? I had thought of a BMW E39 525tds and then of plant oil. Has the oil become so expensive? Or does the diesel machines not last long? What do you refuel as a multi-driver? Always diesel? Greeting spooner