Several Points: 1. The "No-Roisen" stuff may be just yet another snake oil product. 2. The GM bulletin referencing problems with copper soldered joints appear to be totally unrelated to "No-Roisen's" claim about accelerated corrosion rates (sounds like some slick lawyer double speak to me). 3. Prestone's DexCool Approved silicate free antifreeze states: "recommended and approved for use in GM vehicles that require dexcool as well as ALL other cars and light duty trucks with aluminum radiators". (Copper is the apparent problem) 4. Preston also states: "if you are currently using Prestone Extended Life 5/150 Antifreeze/Coolant in your car's cooling system, and you add a conventional antifreeze/coolant, you will lose the extended protection". (No harm done if you mix them!)

 

I installed an Autometer Water Temperature Gauge along with my Oil Pressure gauge and Voltmeter that I installed in a DIN location below my BOSE stereo system.

The Autometer Water Temperature gauge gives accurate readings, but it is my understanding that the stock water temperature gauge was engineered to indicate on the needle normal operating temperature so as to not set off red flags unintentionally for the average driver and thus prevent unnecessary alarm for both the owner and mechanic or dealer.

I had never seen my factory gauge vary after reaching operating temperature since owning my car, but I am able to see temperatures between 180 and 210 depending on weather, conditions, accessories in operation, etc. on the Autometer gauge. By the way this gauge has a separate sensor so as to leave the stock one in place undisturbed.

White96MaxSE

 

mrbill;

You know your points are well taken. I'm not advocating anything stated in the "no-rosion" ad copy on their web site, but I'm not yet convinced that all of the issues here are completely resolved.

I'm hopeful that others here on the .org will put there 2 cents worth into this discussion or point out additional information that we can digest to get to the bottom of this subject.

White96maxSE

 

I kinda doubt we will ever get to the bottom of this subject - same as all of the fun discussions with motor oil. Not only do we have to sort through the facts, we need to attempt to identify and separate the facts from the marketing hype. At this point I "believe" no-rosion is marketed by people making intentional inaccurate and misleading claims just to try to make a buck. Did not mean any offense toward you or imply you were advocating the stuff . I'm going to post some of the no-rosion claims on a m/c bulletin board as many are advocating the use of DexCool approved antifreeze in watercooled m/c engines. Should stir things up a bit at the very least! Thanks, Bill

 

No offense taken. Yep, I've followed the motor oil discussions for some time -that subject goes in circles and waves.

For me, so far, changing the fluid on an annual basis seems to have kept my engine pretty healthy.

I sure would like to perform orthroscopic examination of the internal structure of the cooling system to look for pitting and corrosion, but I have no camera for it.

My fluid that comes out is very clean every year. I haven't seen any solids floating in it or any orange tint either.

I think I will start using Nissan OEM fluid instead of Prestone next time I change the coolant.

So I guess I have learned something!

White96MaxSE

 

No one mentioned Toyota Red. After reading about it, I put it in during summer with Water Wetter. I couldn't say if it works better or not, but they claim to be phosphate and silicate free also.