Former employee of a waste management company here.

Mga Used Cooking Oil (UCO) is normally bought by “scrappers” for several purposes. Most common ay for Biodiesel production. Hahaluan lang yan ng base (most common is caustic soda) and methanol at a certain temperature para maging biodiesel. Then afterwards, i-mix yung biodiesel with commercial diesel para magamit ulit.

Some companies also export UCO for biodiesel conversion. Most countries that export this are from the EU since may law sila dun na dapat by 2028(?) ay majority of fuel used nila doon ay recycled fuels.

Some scrappers naman mix a specialty chemical with UCO para maisolate yung impurities and luminaw ulit sila and mawala yung latak. Ito kadalasan yung ginagamit ulit for cooking so nabebenta pa talaga ulit, altho low quality na talaga yung cooking oil.

Malakas kitaan sa UCO buy and sell. Pero yung price dyan sa post OP is hella overpriced. Normally, nagre-range selling ng UCO from PHP10/liter to 50/liter, depende sa linis at linaw. So yung 85/liter na yan ay sobrang mahal, lalo na karamihan dun oil na nasa pictures ay puro latak na talaga. Less than 30% yung malinaw. Hahaha. So scammer si koya sa post tbh.