Mixing Alcohol & Diesel?

I used to work for VW/Audi/Porsche/Volvo dealership.

Yes the old diesels will happily run on veg-oils, though we used to get 'secret' service bulletins to not to honour any engine/fuel warranty claims if the car smelt of anything non 'pump'.

New cars, don't do it

Fish

"not to honour any engine/fuel warranty claims if the car smelt of anything non 'pump'."

Unless you're out of waranty or otherwise don't mind assuming total responsibility for your motors I think that trumps the science.

The simple rule should apply:-

If in doubt, don't do it - check before your actions have consequences.

I think that this covers everyone, with all abilities and standings as Captains, Engineers, always err over caution.