In še nekaj: za biodizel oz. nasploh biogorivo se, kokr js vem, smatra gorivo pridelano iz za to namenjene rastline...
Biofuel is defined as solid, liquid or gas fuel derived from recently dead biological material and is distinguished from fossil fuels, which are derived from long dead biological material. Theoretically, biofuels can be produced from any (biological) carbon source; although, the most common sources are photosynthetic plants. Various plants and plant-derived materials are used for biofuel manufacturing.
http://en.wikipedia.org/wiki/Biofuel
Olje iz friteze najverjetneje tudi spada v to kategorijo, ampak se NE uporablja kot biogorivo na črpalkah.
Vem pa, da McDonaldsovi tovornjaki furajo na njihovo usrano olje...

@monster_d : Olje je potrebno prefiltrirati s filter papirjem (ne vem strok. izraza zanj

