Blends of cottonseed and sunflower oils with vacuum gasoil were catalytically cracked in fixed bed microreactor using commercial high alumina zeolite FCC catalyst and halloysite nanotubes as a catalyst. Halloysite occurs in nature as clay nanotube with large 5-20 nm inner lumen that provides cost-effective way to produce mesoporous cracking catalysts with low environmental footprint. Performance of the cracking catalyst was significantly improved in terms of gasoline yield and coke formation upon addition of halloysite. Hydrocarbon content of the gasoline fraction was analyzed in detail and efficiency of the skeletal isomerization within halloysite pores was observed to be significantly higher than with the FCC catalyst alone, increasing the yield of the branched hydrocarbons in produced gasoline and hence octane rating. (C) 2016 Elsevier Ltd. All rights reserved.