Prestone AS170Y Super Radiator Anti-Rust Fluid for Optimal Engine Performance

Tucson Buyer: I know it says "Anti-rust", but right below that it says "with Water Pump Lubricant". THAT is why I bought it. Water pumps make the worst sound when they are burning up. Really loud, awful sound. I was ready to spend $500 on a new water pump when my neighbor recommended this product. Never heard of it before, but he is really good with cars, so I ordered it. Well, 12 months later, I still have not purchased a new water pump. I used a single bottle about 12 months ago. The sound came back last week, so I added another bottle. Sound is gone immediately. Same ol' water pump works like a champ. This stuff is liquid gold.

United States on Jul 25, 2023

DAVE B.: Price was right. Hope it works but there is no way to really tell.
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United States on Feb 14, 2023

Susan J. Rogers: Works good.

United States on Aug 20, 2022

Frank: Modern antifreeze was not available until some time after WWII. Corrosion, however, has always been in existence. Most cars up until a bit after WWII used water, an anticorrosion agent, and a third substance (sometimes methanol) for antifreeze when necessary. Because the boiling point of water is higher than most modern antifreeze, well-maintained cars during that time did not tend to overheat as often as a classic car will running antifreeze in our time.

I have a 1949 Pontiac and live in the South, where freezing weather is rare but it is very hot in the summer. My car ran a bit hot with antifreeze, so I drained the antifreeze and put a container of Prestone anticorrosion and distilled water in my cooling system. Nearly a year later, I had to have transmission work done on my car and the shop notified me they would have to drain the coolant to perform the work. After they did, they called me and wanted to know what I used in my cooling system, because the liquid drained from my car was COMPLETELY CLEAR with no sign of any rust or corrosion. The engine on my car has not been rebuilt and I am using the original radiator.

Thus, I highly recommend this product for older...

United States on May 02, 2022

Sam: This product is a watery milky color. Putting it in the coolant makes it look a bit cloudy which is why I have 4/5. It works great as far as I can tell. You just lose that nice normal coolant appearance making it kind of sickly looking. I put this in after thermocure rust remover flushes.

United States on Nov 02, 2019