When you cut to the basic principles of heavy-duty trucks it comes down to return on investment: maximum mpg, meeting emissions requirements and the truck running at optimum conditions and ...

Hagerty Media reader DUB6 writes: Sajeev, I’m going to turn your high-powered investigative prowess onto a topic that might be appropriate, since warmer weather is right over the horizon. Some of us ...

Q: I had the radiator serviced on my car, just preventive maintenance. I noticed on the repair invoice that I was charged for a cooling system additive. When I asked about it, the cashier said they ...

Remember when nearly all coolants used to be green? Now they seem to come in every color of the rainbow. Are they all really that different? What sets them apart, and how do you know which ones to use ...

Some vehicle manufacturers specify a cooling system additive, which is often a type of stop-leak. A key stuck in the ignition of a Subaru Forester is often caused by a faulty switch at the base of the ...