If your engine is showing signs of overheating, it might have developed hot spots. Here's how to identify and prevent them so you extend your engine's lifespan.

Coolants are the least understood fluid in a heavy duty truck engine today. But a little attention to them can avert serious problems for your fleet. Photos: Prestone If you’re a maintenance manager ...

Elizabeth Nelson, coolant program manager at Polaris Laboratories, a fluid-analysis company in Indianapolis, Ind., tells a story that would strike fear into the heart of any fleet manager. A class-8 ...

Regularly checking your car’s coolant during summer is essential to prevent engine overheating and costly mechanical damage. High temperatures and frequent air-conditioning use increase stress on the ...