Possible blown

I'm afraid something in my engine is straight F*cked, sometimes it runs really smooth, then it'll run really torquey like american muscle (kinda rough), there was antifreeze on the ground when i pulled out my car today to get it washed, and there is antifreeze dried onto the top of the radiator area ...i'm hoping this isn't normal but then again i am hoping nothing is wrong, also my antifreeze tank went from full to the empty mark in not much more than a week, i'm checking again tomorrow and calling the dealer, but do i have a good reason to?

checked the oil, oil is staying even
7500 miles on car

did jack it up to get underneath to check cat and see if i could gut it easily
some was dry some was wet

have you noticed if it has been getting hot?

it warms up quickly but stays right in b/t H and C on the engine temp gauge, it always has though

hmm you would think running low on cooliant your car would run alittle hotter .... but only thing I could suggest check the basic shit then probably take it to the garage or dealership

yeah i made an appointment w/ the dealership i got some warranty work to see if i can get done too like the pressure plate crap

it was at the LOW mark on the tank, it wasn't quite out yet