Evans NPG coolant

[philntx]

Have any of you guys seen this?

http://www.evanscooling.com/main21.htm

I ran this in my 97 Blazer with a 5.7 Vortec. Never ran over 210 with the A/C on in Dallas.

I'm planning on running it in my 2000 6.0 Magnusson blown Blazer also.

[HenryJ]

I don't like it. Never used it, but don't like what I see.

Question: What can I add to Evans Waterless Coolants in case of an emergency?
Answer:

In the past we have suggested propylene glycol or ethylene glycol based regular anti-freeze in small quantities as an emergency substitute for Evans Waterless Coolants. Research has shown that the potential of contaminating your Evans Waterless Coolant increases when adding uninhibited coolants due to what is called "black coolant." Black coolant is an industry wide problem when the coolants are contaminated, because of the multiple variations on the market today of regular coolants. Evans suggests adding nothing except an Evans Waterless Coolant or Evans Prep Fluid to your Evans Waterless engine cooling system.

If I need coolant I have to use only the Evan NPG. That will not be found at a local gas station or repair shop.

Question: NPG has the lowest freezing point of all the coolants, why can't I use NPG in extreme cold?
Answer:

The coldest suggested operating range for each coolant is:
NPG: -79° F freeze protection, +32° F coldest suggested operating temperature. NPG is the thickest of Evans Waterless Coolants and requires modifications for use in lower temperature ranges.
NPG+: -40° F freeze protection, -20° F to -30° F coldest suggested operating temperature with proper warm up or block heater. NPG+ is a year-round coolant and the only coolant for diesel engines.
NPGR: -10° F freeze protection, +32° F coldest suggested operating temperature. NPGR was originally developed for racing only and is NOT suggested for cold weather operation. NPGR can also be used on the street in copper brass radiators due to the lowest viscosity.

Not a good idea for cold weather operation.

Question: Do I need a Zero or low pressure radiator cap with NPG+ ?
Answer:

NO. You may use your standard radiator pressure cap. In fact, we recommend a 7lb cap to keep NPG+ from absorbing water from the atmosphere. Some users found they could smell coolant, again a 7lb cap eliminated the issue. NPG+ will still cool your system with industry leading efficiency. Of course if you'd like to run a low pressure or even zero pressure system, you will need to purchase a low pressure cap or modify your existing cap. Please consult our tech pages or instruction guide (or call us) before modifying your existing cap!

Water is a contaminant and readily absorbed. That doesn't sound good.

Question: Is NPG a "DRAIN AND FILL" product?
Answer:

If your system already has the effective flow rates needed to run with NPG, the answer is YES. Unfortunately, most vehicles, with the possible exception of large heavy duty engines and motorcycles, need some sort of modifications to establish the necessary flow rates required for effective operation with NPG. However, in most cases NPG+ (not to be confused with our older NPG) is a drain and fill product.

Flow rates need to be improved for optimum performance, hence the sales of their pumps, radiators, thermostats and caps.

Question: What will the COOLANT GAUGE read when using non-aqueous propylene glycol (NPG) coolant?
Answer:

The normal operating range of standard coolant (ethylene glycol and water) is 160°F to 230°F with some cooling systems able to function reasonably well up to 240°F; although as this extreme temperature level is reached, the engine will almost always operate with ever less power and response until it boils over and stalls. At approximately 330°F the coolant warning light would normally light up; a cooling system operating with the more modern needle gauge would indicate higher coolant temperatures as they developed. As NPG contains no water, coolant temperatures can rise to higher levels without a negative impact on the performance of the engine. In fact, with NPG in many cases the activation of the coolant warning light represents a false warning as NPG works very well at 330°F. Gauges may show the needle at 330°F, a temperature probably located in the red, but again, no concern is warranted with NPG coolant.

I don't want higher operating temperatures! What protection does the oil have at 330°F?

I could go on , but why?

Bear in mind that I have no experience with this product.
I will not be trying it either, sorry.

[killian96ss]

I would just stick with Redline Water Wetter since it has been proven to work very well and it can be mixed with any type of coolant.



Steve

[crew cab sonoma]

i was tempted to try the NPG+ years ago, but im still skeptical.
some of the claims just sound to good to be true, and you know how the saying goes....
plus, it has a definite disadvantage in price, availability, and not being able to add water after a spill.

and it still isnt as thermally conductive as a EG/water mix.
not even close. thus, the recomendations for higher capacity pumps, thermostats, and radiators...