Since when does injector cleaner pour like oil?
 

At the filling station I decided to add some Lucas injector cleaner and as I was pouring some into my car's tank I noticed it was taking a while to empty the bottle. Turns out the stuff pours out like a thick goo and even smells like motor oil. Is this suff supposed to be this thick or did I just pour half a bottle of bad cleaner into my tank?

Thanks

supposed to be like that, it's an all in one type thing