i had a 2011 international death star that would go 71 downhill at a second's notice. got something like 30 overspeeds in about eight months
No doubt, the maxx force engine brake is worthless ! The 2012 I was in had some Some nice features and got great fuel mileage. But with summer coming. I didn't want to roast , so I got me a sweet 07 pink freightshaker with a apu . Y'all can have them pretty new trucks.
i have a 2012 now that never gets over 6.85, no matter what i do. when my mpg goal went to 7.20, my interest in fuel economy went to zero.
Not all Prostars are equipped equally. Mine has the nifty autostart feature. When batteries get low, the truck will start and idle to recharge them...also in real cold weather it will start to get coolant warmed up to warm the bunk. I got cussed out by a driver that has a Prostar without that button...