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The fuel consumption increase with LPG seems to be higher than with ethanol. Well, considering that sometimes Italian ethanol made out of grape leftovers from wineries is imported here in Brazil to keep the regulatory stocks out of the sugarcane season, it does surprise me that grape-based ethanol didn't become popular in Portugal. I know, most of the leftovers are actually turned into some distillates used to "fortify" the wine like it's done with the world-famous Porto wines and the Spanish Xerez...
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