Welcome Kymco Owners!
Used cooking oil is used by a lot of people in the poor areas in Asia... do they have a choice? Beats not scooting I'm sure...may actually be better than what we're using.
Interesting reading on the oil issue...http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1692715
To haul that load with used cooking oil is amazing...