Das Panzerwagon is back

Das Boot! Das Panzerwagon! The German toaster! Brave Little Toaster! Whatever silly names I make up for my car, it's been to the mechanic and I forked over a lot of money for new spark plugs. It seems the plugs were really worn down. What bugs me is that the dealer shop didn't say anything when we last went up there. So from the last visit to now, the plugs got that bad to misfire and gunk up? Of course I paid $500 for the repair. It was all in the cost of the labor. But the tank is back.