Why was a cooling system additive used when car was serviced? Car Doctor

I had the radiator serviced on my car; just preventive maintenance. I noticed on the repair invoice I was charged for a cooling system additive.
The New York Times

Pistons beat Bucks, continue success on second leg of back-to-backs

The Pistons are 4-1 on the second night of back-to-backs this season. Brian Sevald / Getty Images DETROIT — The Detroit Pistons’ depth has been one of their strong suits all season. They’ve battled ...

10 of the most reliable diesel pickup trucks in North America

RealTruck.com reports on the latest truck accessories, featuring new products to enhance vehicle performance and style.