Of course VO/WVO won't replace every car on the road, obviously. However, it can and does have a perfectly viable portion of the market. Look at diesels - they are dwarfed by regular gasoline cars due to consumer perceptions, government regulation and other market conditions. They will never be 100% of the market, and nor will VO. But there is nothing wrong with occupying a small % of the market.
There are other limitations too, such as crop yields. If you calculate the amount of acres needed to replace all fossil diesel with biodiesel, or gasoline with ethanol and you quickly find out you would need to replace all the crops in the US with soybeans or corn, respectively. For those reasons those fuels will never fully take over either. But again, they both fit into the jigsaw puzzle in their own way.
Maybe there isn't enough waste restaurant oil for everyone, but even brand-new vegetable oil from Costco or Sams is often cheaper than regular Diesel fuel depending on price fluctuations.
Besides, why go through all that processing to turn VO into biodiesel (that's what BD is - chemically altered VO) when you can run it straight?
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Of course VO/WVO won't replace every car on the road, obviously. However, it can and does have a perfectly viable portion of the market. Look at diesels - they are dwarfed by regular gasoline cars due to consumer perceptions, government regulation and other market conditions. They will never be 100% of the market, and nor will VO. But there is nothing wrong with occupying a small % of the market. There are other limitations too, such as crop yields. If you calculate the amount of acres needed to replace all fossil diesel with biodiesel, or gasoline with ethanol and you quickly find out you would need to replace all the crops in the US with soybeans or corn, respectively. For those reasons those fuels will never fully take over either. But again, they both fit into the jigsaw puzzle in their own way.
Maybe there isn't enough waste restaurant oil for everyone, but even brand-new vegetable oil from Costco or Sams is often cheaper than regular Diesel fuel depending on price fluctuations.
Besides, why go through all that processing to turn VO into biodiesel (that's what BD is - chemically altered VO) when you can run it straight?