02-23-2015, 07:58 PM
Richard is correct in my opinion. AND there is a version of OAT by Cummins called ES Compleat that is compatible with all other antifreezes; that makes it easier to add coolant on the road and not have to worry about it all turning to goop and destroying your engine. With proper maintenance it should last as long as the coach. It ain't the cheapest stuff but I love the flexibility it offers plus the protection security for the engine and coolant system.
I spent weeks on the computer and phone trying to figure it out. Your conclusions may vary if you do similar research. While your current coolant may be just fine, if you don't know what you have there is some risk of some coolants not playing well with others that is only avoided by trusting what you have. It only costs $300 dollars or so to make the change, in the grand scheme of things that's probably the most inexpensive insurance you can buy.
I spent weeks on the computer and phone trying to figure it out. Your conclusions may vary if you do similar research. While your current coolant may be just fine, if you don't know what you have there is some risk of some coolants not playing well with others that is only avoided by trusting what you have. It only costs $300 dollars or so to make the change, in the grand scheme of things that's probably the most inexpensive insurance you can buy.
Jon Kabbe
1993 coach 337 with Civic towed