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Bjorn, Just out of curiosity, does it mention anything on the back of the can pictured in post #13 about evaporator systems?

My understanding is, that the older systems are less affected by alcohol than the newer systems. The reason given to me was that the older seals were made with more real rubber and most internal parts were some sort of metal. Nowadys these seals and internal parts are made from various plastics...

Tech Bulletin Here's a 2007 Bendix Tech Bulletin that addresses alcohol and other additives in newer style systems.

They don't want you using it on the newer trucks with air dryers as it 'could' cause an explosion when it gets to the heated dryer. On the systems like are used on older trucks and the deuce it's totaly safe.

Here's part #s Here's some info on the evaporators. They can be purchased at any heavy duty truck parts supplier and the cost is minimal. I would not recomend riding around with glass jars full of alcohol or any other liquid under your hood. I will tell you that the AE-1 is what the military...