(It also says some unflattering things about the rationality of buyers that they let short term price variations greatly influence buying an expensive item they

(It also says some unflattering things about the rationality of buyers that they let short term price variations greatly influence buying an expensive item they will be using for years). I don't know - at least for those without any specialist knowledge, retail fuel prices can likely best be approximated as a random walk, for which the best estimate of future value is the current value.