MTFCA Forum

I would settle for tarnish if it didn't etch the surface.

I use a funnel so I don't spill any and found a gasket so the radiator cap doesn't leak. pretty much solved any spill problems I had. A towel around the top of the radiator when filling is a good thing too.
It does take a bit of work when a spill happens and I've never found a type that doesn't. I always use the green Conventional type.

Glycerol (glycerine or glycerin) was the first antifreeze but was expensive to produce in the 30's. It is a colorless, odorless, viscous liquid that is sweet-tasting and non-toxic. Its use is being promoted again because it is a byproduct of producing Biodiesel. There are several types of antifreeze today green (ethylene glycol) and orange colored (Dexcool). The green coolant contains additives (phosphates along with silicates) to protect the metals in the vehicle’s cooling systems from becoming corroded. The orange coolants use organic acids to prevent corrosion and were created for vehicles that have more nylon and aluminum parts in them. NOTE" The two should never be mixed together; doing so will cause a thick, jelly-like substance that can completely stop all coolant flow which can lead to overheating.
Best way to prevent tarnish - Wax your brass.