Royal Purple01600 Purple Ice Radiator Coolant Additive 12 oz. Bottle Pack of 4

I own a vintage car which occasionally has a tendency to run hot.Ever since I started using Purple Ice that problem doesn't exist.It lowers the coolant temperature.

I got 15°f in a closed space with little air flow

Helps to lower your coolant temp but not a miracle fix.

Can't beat Royal Purple products! My shop has been using them successfully for years.

Keeps my car running just a bit cooler in the extreme heat. I have used this for 15 years, and still love it in my three cars.

Does what it says it will do

Let me tell you a story of how this stuff completely destroyed my motorcycle. But before i start i have heard good things about this product and this might be a one in a thousand event but none the less im pissed. I had been using Factory coolant in my 2009 Suzuki Gsx-R 750 since i bought it.I never had any problem. I did track days in 100F+ and never had heating problems. The bike was fine and had no signs of any problems. I then was told by one of the track day vendors that i can't run antifreeze in my bike, because it super slippery if you crash and it gets on the track. So i research on what i need to do and i had two options Royal Purple-Purple Ice+ or W.W. My local parts store had Purple ice so i decided to go with that. I followed the instructions on the bottle. "Bottled, Filtered drinking water is recommended." This should have been a huge red flag. So i went and got a bag of 12, 12oz bottles to fill my coolant system. I did the "2oz per quart of coolant with straight water." Fast forward to after my next track day. The day went fine no cooling problems. I take the bike home and off the truck and park it in my garage for 5 days until the next weekend. I start to put all my street stuff back on the bike to go riding the next weekend and i notice a small amount of water under my bike and that all my hoses are rock hard and there is a ton of pressure in the coolant system. figuring that is REALLY odd after 5 days. I relieved the pressure out of the system and called a freind that owns a motorcycle shop. he advised to check the thermostat to see if it stuck closed with something clogging the check valve. Upon draining the system a torrent of white chunks came pouring out. Pictures included. After putting 100% Distilled water in the bike and bleed the system and warmed the bike up to put some pressure in the system, Water started to leak out of my radiator. I removed the Factory radiator and had it pressure tested. This stuff eat away the radiator, there were hundreds of little pin holes in the radiator air bubbles were coming out of the fins. and one thing i found out is that factory radiators for motorcycles are NOT cheap, 700$+. So i was forced to get a cheap reman radiator that doesn't flow as well. after about 5 months and 4 more track days i can tell you this stuff has lined my engine with whatever this white stuff is and i have been having cooling problems since. if its anywhere in the 90F+ after i get back to the pits my bike is boiling over. Even with it running and the fan blaring the bike doesn't drop below 230F+ so when i cut the flow off it spikes to over 250 and the distilled water boils out and i have to add water. So to date i have flushed my bike well over 20 times with nothing but distilled water when i have a track day ill add W.W and it works well but i still have problems and i still get white stuff coming out. I was planning on doing a race season but i guess that's out on this bike. THANKS ROYAL PURPLE for potentially costing me thousands of dollars to rebuild or buy a new motor!Update 07/02/17After finally saving up for better radiator and trying a few different aftermarket coolant flush and trying white vinegar in the system. Nothing has changed. i put a endoscope where the thermostat goes and the inlet to the radiator and this stuff did more damage then i previously thought. The damage caused by this product is going to cost me almost 2,000$ to fix. The engine will have to come completely apart and cleaned. New pictures were taken last night.

Followed their directions bought 6 bottles . Did nothing.