[Chris Haynes]

I flushed my engine. Refilled the cooling system with RUST911 and drove it for a day. Drained the system and black water came out. I refilled it with a fresh batch of RUST911. Drove it for another day and drained it. Grey water this time. Drain and refill with RUST 911 again. When draining it the next day the water was clear. Removed the hoses and inlet/outlet and looked inside the block and head with a light and found it to be clean bare metal. The inside of the radiator was also sparkling clean.