So obviously if you called the previous poster a retard you have never dealt with those types of people so please dont speak of things or people that you have never dealt with.
Its efficient enough, check my sig but i only have 1 battery i was about to do two but i stuck with one and i have no dimming whatsoever. You would be fine Its an awesome amp
my 5.0 gets 28 miles per gallon at 65, and like 18-20 around town. Just throwing that out there
But id say dont do 95 on the highway, check your tires, check your fuel system for cleanliness