Engine

Asking your mechanic for a general tuneup isn’t really a viable request anymore — nor is it likely to be the fix for a running problem.

A bad tank of gas can be caused by a variety of issues, and it can prevent a car’s engine from running as well as it should.

Engines are getting smaller and more powerful, but these high-strung engines may not be as reliable in the long run as older engines.

While having too little oil in your engine can understandably cause problems, having too much oil can be just as bad.

VVT-i is short for Variable Valve Timing-Intelligence, an early version of Toyota’s variable valve-timing system that came to be offered on many of the company’s engines.

Powertrain control modules determine how much fuel to inject into the cylinders and when that fuel should be ignited.

High-mileage oil can include additives to reduce wear, corrosion and leaks, but stick with the manufacturer's recommendation and only switch if such signs appear.

If you’re in the market for a new pickup truck, you may be wondering if you should get a gas engine or a diesel engine since there are significant differences between the two.

Using regular gas in an engine that requires premium could void your warranty if it causes severe engine knock or pinging.

EGR stands for exhaust gas recirculation, and the EGR valve is part of a system that recirculates exhaust gas back into the engine’s intake manifold for a return trip to the cylinders it just left.