This thing saves lives. I saw it advertised on TV on one of the auto repair shows. I messed up adding green antifreeze to red antifreeze in my '06 Tacoma. The radiator is almost completely clogged; There's probably some part of the radiator clogged, but I couldn't tell. I used the conditioner exactly as directed in the instructions. However, I drained the antifreeze and rinsed with distilled water before adding the rinse chemical. The end result was impressive. 3 years later my truck now has heater and it is needed here in central Ohio. I highly recommend this product!