Well, as a commercial trucker, I have run into a few that have tried this stuff. Most are not happy campers. The stuff has a tendency to thicken and there has been a couple that have run into engine head issues. I was considering it at one time, but am not going to even give it a shot. I will stick with the brand name red ELC coolant. It has an excellent track record, is endorsed by the defacto trucking maintenance authority in the nation, the Technology Maintenance Council. It is by far just about the best stuff for keeping water pumps lubed and preventing cavitation on cylinder liners. For road use, it is good for 600,000 miles with only a bottle of extender added at 300,000 miles. No SCA's and other junk like previous coolants, as ELC does not use SCA's. It is virtually maintenance free except verifying freeze point. Available were ever trucking lube products are sold. All of my equipment, and my new semi truck, come factory filled with ELC per my specification. What equipment didn't, it got changed to ELC right out of the gate. Only a little higher in price than traditional coolant in a 50/50 premix.