Been running it for about 13 years now and have no problems. I use a low pressure cap (about 7 psi) and one time I had an issue with the fan contacting the shroud, the fan cut into the radiator after a blade was bent, and I barely lost any coolant, due to the low pressure. Currently have engine out of the car to put a milder ,more streetable cam in it, and I just drained the radiator and engine block, putting the coolant in 1 gallon containers until I reinstall it (doing some engine compartment detailing and installing 1/4"spacers under my mount brackets due to very high mileage on chassis). Coolant looks good as new, and absolutley no corrosion in system. Being this is now a weekend "fun" car (that I occasionally take on trips over the weekend), I enjoy the extended life the water pump, hoses, and the rest of the system seem to have without changing coolant every couple of years. It was (is) expensive, but it really seems to be a lifetime coolant.
