when i get to school early i like to watch the simpsons in my max, i don't have an optima battery yet, just the stock one, when i park at school and watch the tv Is it better to turn the engine off or just leave the car running in park and rev it every now and then?????
thanks

 

you can turn it off if you don't watch it for a long time. If you leave it on you dn't need to rev it either.