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Has anyone done both?

I tried Coast down testing with before and after windows down at around 60 mph. Literally no difference surprisingly. I heard that it’s only really effective at super high speeds, over 90 mph and higher

Was going to try the throttle stop testing next, with windows up and down, but my pedal barely moves and I don’t need to push down on it hard ti maintain a high speed. So no idea what it’ll do