I've been searching for the best Engine Flush product available. I wanted to go with the MST Guardian but they went out of business. I have since narrowed my search down to 2 products. 1st one is the "Super Flush" http://www.superflushsales.com/product_3.html (I believe it made by one of the MST Guardian guys. the 2nd is the "QL Neutra-Salt" made by Volvo http://www.mitchsmarine.com/newsite/penta.html <br />I'm not concerned so much about price, I just want to get what's going to work the best. I question the Neutra-Salt's effectiveness. Any input would be greatly appreciated. <br />Thanks, <br />Chris