After that, stop ... your car's engine can result in blown seals, spark plug damage, clogged valves, and gasket leaks. The marks on your vehicle's oil dipstick are there for a reason. Use them ...

Dozens of brands vie for your ... stop leaks. When is the time right to start running a high-mileage oil? The folks at Valvoline recommend you make the switch at 75,000 miles. Zhang said “we use ...