Blaster Man wrote:
wolfe10 wrote:
OK, have to ask-- why don't you want to run an OAT-based coolant. That is the high end coolant by Caterpillar and Cummins (Fleetguard) as well as others for their diesel engines???
I was wondering the same thing. The new stuff is good for years. I put propylene glycol in the Aqua Hot, not the Cummins.
I have a copper heater core. OAT corrosion inhibitors provide excellent long-term protection for aluminum and cast iron, but may not be the best choice for older cooling systems that have copper/brass radiators and heater cores, especially the lead solder used in them.
