My commute is pretty hilly, in my CRX I never press the pedal more than 75% so I try to keep it in 5th at 70% pedal position until my speed bleeds off to where I'm not making much torque and just shift down to 4th and sometimes down to 3rd. I don't have a gauge but it seems flooring it in 5th is worse than driving easy and downshifting. I never hold a steady state unless I bleed off too much speed and need to stop it from losing any more.
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