Originally Posted By: PumpPusher
While my truck was being serviced, the mechanic topped off my coolant with about a gallon of Dexcool. I'm running Zerex ELC for diesels. It's a 7.3 and has a capacity of 8 gallons if I remember correctly. Will this cause any issues?
Stop going there, if you mix coolants it can easily turn to shmoo inside your radiator, heater core etc.
I believe the Zerex ELC is red and is similar with Chevron Delo ELC...
Get them to compensate you for something. Cooling systems are expensive, and I do not know why they would put Dexcool in a non GM vehicle in the first place.