This would be particularly true if fuel volume sales continue to grow, as they have for years, even through the energy downturn. (fool.com)
That added fuel volume / pressure pushes back on the piston, during the later half of the compression stroke. (mechanics.stackexchange.com)
In fact, since the RFS expanded renewable fuel volumes in 2007, over 1/3 of corn production and nearly 1/4 of the oil produced from soybeans have been diverted to biofuels.1 As the EPA points out, «because many biofuel feedstocks require land, water, and other resources, research suggests that biofuel production may give rise to several undesirable effects.» (filluponfacts.com)