well, i realized it was indeed used veggie oil, it had food bits in it. i decided to try filtering some for fun with just whatever materials i could find nearby, it was pretty funny:

https://www.youtube.com/watch?v=HumFaH6BTN0

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w123
1985 300D turbo sept 2015 - present
1985 300TD turbo oct 2023 - present
looking for biodiesel in nyc