Agreed that piece of mind is worth the $. As if I were in a pinch could I use auto coolant. It reminds me of when I bought my first sled and needed oil on the trail. Bleeding air from cooling system! This is a discussion on fresh coolant. What is the best coolant to run and what type of mixture.
At some point, it will seem like the system is full (the reservoir may appear to be full) but the way to prove that all of the air is out of the system is when you start to get a steady stream of coolant come out the vent fitting in the head. Anti-foaming packages help control this vaporizing of the water at the impeller edge and increase coolant life. If you are one of those people that never services their vehicle, then the red (Dexcools) and higher anti foaming control anti-freezes are a good idea.
Otherwise regular green Ethylene Glycol will do the trick.
Fill Your Cart With Color Today! The coolant goes into the cylinders and wreaks havoc on the pistons.