Anyone have any experience with this product? http://www.evanscooling.com/catalog/C_npg1.htm

 

I've been wanting to switch to Evans NPG+ ever since zrwon first brought it up in this thread: Brown Coolant

Not sure if anyone is currently running NPG+ as a coolant replacement in the MINI yet, but I'd also be interested to find out if anyone has experience with the product, particularly how effective it is in lowering temps.

 

I am not sure it would actually lower the temps any, but it sounds like it would greatly increase the effectiveness of the coolant in the block.

 

I haven't heard of anyone on here running it. The main advantage is being able to run a 0 psi cap which reduces stress on the water pump. It looks like we'd have to use the prep fluid as well since the MINI's block drain is not accessible without removing the starter (I think it's the starter).

 

Thanks Kapps


Anyone else?

 

I've been using it in my RX7 for a few years. The main benefit for me with the RX7 is allowing me to run a Zero pressure cooling system while still retaining high boiling point characteristics. This is great for my modified cooling system b/c I do a fair amount of HPDE / track days with it.

Even after using it for so long, I still doubt its usefullness for a street driven car. I probably wouldn't waste my time or money with it.

 

Thanks, would you recommend it simply for the long term benefit? I like the idea of not having to change my coolant for the expected life of my car.

 

I don't recommend subscribing to the idea that "lifetime" fluids are truly lifetime.

Even with the Evans, I change coolant every 2 years. I might be tempted to leave it in longer if I didn't track my RX7 but I'd still change it after maybe 3-4 years. All fluids brake down and loose their efficiency over time and use.

I can't even believe 15k mile oil change intervals... Mine gets changed at 5000. Brake fluid gets heavily bled/replaced every 2-3 years on my street car (Mini etc). I usually change tranny & diff oil every 2-5 years depending on how the car is used and mileage. Not sure what to do about my MCSa with regards to tranny oil. I think I might wait for 5 years but I'll be checking it yearly at least for discoloration and such.

I expect my engine and car to live a very long life.

 

I've used it in a couple cars (Honda & Jeep) in the past...

Neither car overheated before or after using the product. I made the switch for the following reasons:
1.) Longer fluid service life (5- 10 years).
2.) Longer service life for hoses with the reduction in pressure.
3.) Less corrosion for iron & aluminum engines.
4.) More effective at removing heat from the hot spots according to some independent research at M.I.T.

Did I really notice any of these benefits with the "brown coolant" in the past?
No.
However, neither application was supercharged.

I wonder if our computers would advance the timing & produce more power since this product is supposed to reduce detonation by removing heat from the cylinder head more efficiently???

 

I bought some 4 of them at Mooney Speed shop in socal Kinda expensive $32 each and 2 prep fluids $26each. I will put in someday not sure when. just worried if what they mean that ALL the old fluid has to be removed and NO WATER must remain in block. How would I do That?? Suggestions??

 

I had to remove all the drain plugs & there was still some old coolant left over.

The instructions say that water will boil it self out over time (mine did) so I just added a little more coolant a month later.

 

I agree with your points above even though I personally would not run any coolant more than 5 years.

With regards to your question/comment about timing, it won't make a difference. Evans will not affect the overall temps you will see. In fact, under extreme conditions it may run hotter than H20/Coolant but will do so more safely since it won't boil (see Evans page about "localized hotspots").

Timing usually gets pulled by the ECU when certain [high] temp thresholds are crossed. Some other RX7 owners that run standalone, programable ECUs (like me) have actually talked about reducing the point where timing gets pulled due to the above. Since I value the health of my motor in track conditions, I do not.