My Car Runs Bad Could It Be Because IT HAS 660K MILES!

www.autotempest.com/hoodie 1. Why does my 290k mile Ford Ranger run bad. Could it be the high miles? 2.Why does my GM Buick Park Avenue transmission shift so hard? 3. My Silverado Truck AFM engine has metal in the oil what do I Do? 4. Why Does my Power Stroke diesel have low engine power? 5. When should I change my engine oil to protect it from failure? 6. Why does my Honda Element have a low engine idle? It has only done it for 11 years. 7. Will driving with bad sway bar links ruin my struts on a Toyota Camry? 8. Why are my door and light chimes always going off on my Silverado? 9. Why does my 2011 GMC Yukon have low and high engine oil pressure?