Just took my 98 wrangler to an quick oil change place to get an oil change (first one since I bought the car approx. 600 miles ago). The mechanic tried to insist that I need a complete engine flush, fuel injection service, and that my jeep oil smelt burnt. He let me smell but it smelled exactly the same as any other oil I've ever changed. Was he trying to just get me to buy all these useless services? He mentioned that my coolant no longer had any bleaching agent in it which is wh he recommended the engin flush but I've never heard of that before.