I believe that the oil temp in my 95 T-Bird w/ a 96 Cougar engine is running too hot. When I firs got the car it barely moved past the M in NORMAL. Now 7 months later, it is a little past the L. I had the oil changed(Motorcraft 10-40W) about a month ago and climbed a lttle higher since. I'm really worried that it will harm my engine. Could it be that there is old oil sludge left in the engine? Is there a way to flush it out and replace it with fresh oil? Also is there any other thingd that I should get checked? Any suggestions are greatly appreciated.