every so often you should apply the parking brake while moving at a slow speed, to clean the shoe and drum. Plus you should use it as often as possible to stop seizing.
Old thread i know, but having looked in the owners manual it says you should run your ls400 on 96 or higher which explains the difference i get between momentum 99 and normal 95
after filling up with fuel, my fuel range hasn't reset to the extra distance, ie from 40 to 140 miles, its dropped down to 28 miles left even though i put fuel in.