Posted in reply to the post by Edward Mendoza:
There are people who use veggie oil for fuel in their veggie cars. But the flax oil is bad for veggie cars. The other oils you mentioned are good, though. Put an ad right here in Wacco in the Recycle or Free section offering it to veggie car owners, or even biodiesel makers. Also Craigslist might help out but it depends on the amount. If you have at least 20 gallons or more, then there is a fair or even good chance that someone who fits this description will come pick it up.
If it's less than that then try to use it in other ways such as water/oil candles, making soap, adding it to your compost, adding it to chicken feed for your chickens or other animals, etc. Google: "uses for expired vegetable oil."