Coolant discussions can turn into oil wars. I bought a parts car with a good motor which sat for 2-1/2 years. Had green coolant. No problems, no rust, no pitting anywhere in the aluminum. Radiator didn't leak, hoses great inside. That said, the green stuff gets acidic and can shorten the life of plastic parts. Given the life of our cars, and the expense of parts, I belive its wise to use the MB coolant which is slightly orange. MB coolant is what I put in that parts car engine when I put it in my daily driver.

To dispose, flush it down the toilet. I believe that's approved in many places with sewers. If I had a septic, I'd find another place for it.

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Brian Toscano