I honestly have not noticed a huge difference between my 75k mile, 10 year-old original factory fill and my new RP.
Although, when my car sat outside at the airport during a very cold week recently (with ATF), I could hardly move the shifter when I climbed in. I haven't been able to duplicate those conditions with RP in the box.
Otherwise, it's a little slipperier going from gear to gear, but still notchy. I hope this isn't a bad omen. Maybe I just expected too much.
