Oh, if it is old enough you should run it on old cooking oil. Knew someone that had an old diesel rabbit who was all into alternative fuels and ran it on leftover oil from a fryer, smelled like french fries.
B100 smells like food, too (the stuff I typically buy is a byproduct of chicken rendering plants, so it smells like fried chicken).
WVO vs. biodiesel is kind of a “six of one, half a dozen of the other” kind of thing: either you modify the car to run the unmodified biofuel, or you modify the biofuel to run in an unmodified car. I prefer the latter since it’s simpler and I can just buy it.