Every Tu Bishvat my wife and I give money for Palestinian olive trees as an antizionist alternative to the JNF "Plant a tree in Israel" bullshit; this year I want to also buy oil, which will give an unusual mitzvah opportunity / predicament: separating terumah!
I've wanted to do that for a while but had to research the proper way to handle it. My current understanding is that we'll take out a small token portion (not needing to be a specific fraction), designate it as terumah, and then burn or bury it as it will immediately be tamei