badchev

I am running a 5 cell pack in my MP and wondering if 7.5 volts is too much for my reciever. I am using a futaba reiciever. Also why do people use heavy oil in the front diff and lighter in the rear, as you accelerate you front tires lift a bit so would it not make more sense to run heavy oil in the rear and lighter in the front as the tires are grabbing more on the rear?


Thanks