There are a few different cooling additives (like water wetter) that can be added to the radiator... anyone know which one works the best. I've seen some brands that cant be added to radiator fluid... I guess they're added to plain water... No good for me because I don't want to spend hours flushing the entire system clean with water.

I like purple ice from royal purple, just my preference but water wetter is good too?

The water coolers are intended to be added to plain, er, distilled, water rather than an antifreeze/water mix.

Since I have a 7 gallon capacity in my dually, I tried two bottles, because it read one bottle to 4 gallons, and noticed no difference in temperature.

WATER!

I have seen no differance with the additives! A waste of money IMO.

Run a thinner mix of coolant or straight water with water pump lube in the summer. For winter don't forget to replace the coolant. Works great, this is what racers use!

Good Luck :D

Im with Motor head... marketing propaganda just to suck a few more profits.
I use a 50/50 mix summer and winter.

Sorry to tell ya guys cooling fixes dont come in a Eight dollar jar

why do you think Prestone is not selling the stuff ... if it were so great

I have heard this from others that have used it also .
No change in cooling effects ... dont trough your money away .

get to the source of the problem .

match your cooling system to the BTU , out put of the engine ... more Btu's means more cooling needed ... I.E better radiator or more cfm , like electric fans and so on .

I use water wetter in my 69 with distilled water,IT MAKES A DIFFERENCE!!

MOst folks don't understand what WaterWetter and Purple Ice do....and as a result get disappointed in the results or lack thereof.

Both WaterWetter and Purple Ice are surfactants that modify the way the coolant (water or a mix) quenches metal surfaces. These surfactants indeed do work in applications that are having problems with "hotspotting" and need surfactants to help keep the coolant ON the surfaces and to prevent "gassing out" or boil over. If you are having problems with keeping coolant in due to hot spotting and overheating...then the product could likely bring your temperature down due to the ability to cool the affected surfaces. Also, these surfactants will allow the coolant to absorb heat faster (don't confuse this with more or specific heat numbers) and if you have the ability to remove more heat at the radiator it could help bring temps down as well.

As we all know water is the best carrier of heat. As one poster commented...keeping the ratio of water to antifreeze high (alot of water in other words) then the specific heat number of the concoction is high...and carries more heat.

The recently developed antifreezes however are upgraded with surfactants already present...so additives are really not necessary. In fact, using more WaterWetter or adding them to antifreeze solutions could damage those cheap gaskets that come with some gasket sets by literally penetrating the glue media and turning them to jelly! I have seen this many times. So, beeeeeecareful.

One other point about pump lubrication. Modern water pumps do not need any lubrication per se, they are all have hermically sealed bearings...so none needed.

If you're looking for better cooling... higher water content, higher airflow and higher coolant flow is the ticket.