Gatorade or Powerade mixed with water?

I exercise a lot (on my bicycle anywhere between 30 and 100+ miles a week, as well as playing hockey 2 - 4 times a week, sometimes also tennis, soccer or basketball) and consequently drink a LOT of Gatorade or Powerade (personally I prefer Powerade) .. so to make it last a bit longer I often mix it 50/50 (half of that drink; half water) .. is this ok or should I drink it full-strength? Although there's a difference in taste I haven't noticed getting dehydrated any faster, likewise fatigue.