Navy Warrant
New member
I use Engine Ice (propylene glycol) in my '15 RT LTD. While at the shop for other service I asked them to check the fluid levels. When I came to pick it up they told me the coolant was a half quart to a quart low and they topped it off with green coolant (ethylene glycol?). They should have known better because they're the ones who flushed the system originally and filled it with Engine Ice, and it should be in the maintenance/service records. (OEM coolant for a Spyder is the long life orange coolant anyway, so why short life green? But I digress.)
I've heard things from very bad to no biggee. Need KNOWLEDGEABLE advice here, not personal opinion. Engine Ice company says not to mix the two, and then I've read that you can but the heat transfer is negatively affected. If no biggee, fine. But if so I'll need to insist they flush and replace the coolant. It's expensive, but I do have a couple of spare bottles.
From the Engine Ice FAQ's: We recommend you never mix ANY TYPE of coolant and antifreeze products. One reason is that propylene glycol and ethylene glycol do not mix well together. Another reason is that just because the base fluid may be similar, other additives and ingredients may not be. Just as you would not mix oils, and for the same reasons, you should not mix coolants and types of antifreeze.
I've heard things from very bad to no biggee. Need KNOWLEDGEABLE advice here, not personal opinion. Engine Ice company says not to mix the two, and then I've read that you can but the heat transfer is negatively affected. If no biggee, fine. But if so I'll need to insist they flush and replace the coolant. It's expensive, but I do have a couple of spare bottles.
From the Engine Ice FAQ's: We recommend you never mix ANY TYPE of coolant and antifreeze products. One reason is that propylene glycol and ethylene glycol do not mix well together. Another reason is that just because the base fluid may be similar, other additives and ingredients may not be. Just as you would not mix oils, and for the same reasons, you should not mix coolants and types of antifreeze.
Last edited: