I know this is an old thread, but it's recently pertinent for me.
My rig is a 2005 HR Ambassador with Cummins 330 engine.
Recently, while on about a 300 mile trip towing a Jeep Liberty, the engine began overheating when going up long moderate grades in 90 deg heat. About 2/3 way into the trip, the water pump gave out and a hose blew. We had it towed to a big rig truck center for repairs. They replaced the bad components & the radiator cap and advised me that the coolant reservoir showed a small leak around the filler neck when pressure tested. I drove it home 120 miles with the Jeep in tow with no problems, albeit only 75 deg air temperature that day.
This weekend I replaced the overflow tank, but in the process lost a couple gallons of coolant which was green in color.
When I purchased supplemental coolant, I got Final Charge ELC, not knowing at the time that there might be compatibility questions to be asked. My questions are:
1 Should I be concerned about the green color antifreeze they put in (it was a large diesel truck shop).
2 Are there any concerns about the 2 gallons of ELC (red) that I added?
3 Would test-strip testing be appropriate and what to do if it comes up short?