NPG+ worrying news

So the temperature drop across the radiator is more on the Evans car and you say it cools worse. Yes that is incorrect data and makes me question the scientific method that you used to test your theory.

Also cooler fluid enters the engine and it exits at a larger temperature difference. So it is absorbing the heat from the engine better. But yet somehow the valve cover and oil filter housing is hotter? Your figures are all over the place. I run test in a lab for a huge engineering company and if I turned in data like that I would not have my job long. Idk what your theory is behind it but to me it doesn't seem very credible.

I don't want to argue on here but as I have said knowing how controlled my tests are at work I'm sure they do pretty extensive research at Evans. I posted a link a few pages back that showed one of there test and the detail they use. Evans has been nothing but good to me. I personally am surprised this thread hasn't been locked due to all the bad information that has been spread here.

Im not here to convince anybody. Just posting my findings.

One other note, We were not worried about the bottom radiator hose, but there was no way to get a good reading from it for us, We took all the temps 6"s away from the the sources and there was no easy way to get close enough to the bottom radiator hose.

If and when I flush the NGP+ i will re take my temps.

Originally Posted by 96 GGM 528I

So the temperature drop across the radiator is more on the Evans car and you say it cools worse. Yes that is incorrect data and makes me question the scientific method that you used to test your theory.

There is no science to it as he mentioned. It is just his findings. To me, I like to see the change (if it was correct) of a hot upper radiator hose and much cooler lower radiator hose. That means your radiator or fan is working well. I also like the fact that the temperatures are high via the OBC, which to me means the transfer of the engine heat is high. What would concern me is the increase in oil temps (which was not done) or the valve cover or other engine components. But again, you can't compare two different used cars and make a comparision. I would like to see a decrease in engine components temperature and increase in coolant temp. The heat has to be transferred somewhere and the place it should go is the radiator and coolant. Thanks for taking the data.

Originally Posted by ZeroR2

There is no science to it as he mentioned. It is just his findings. To me, I like to see the change (if it was correct) of a hot upper radiator hose and much cooler lower radiator hose. That means your radiator or fan is working well. I also like the fact that the temperatures are high via the OBC, which to me means the transfer of the engine heat is high. What would concern me is the increase in oil temps (which was not done) or the valve cover or other engine components. But again, you can't compare two different used cars and make a comparision. I would like to see a decrease in engine components temperature and increase in coolant temp. The heat has to be transferred somewhere and the place it should go is the radiator and coolant. Thanks for taking the data.

Thank you for understanding.
Who knows maybe an M62tu with 184k runs hotter.
I have a shelf of 4 jugs BMW coolant and 4 extra NPG+ jugs i planed on using one or the other in my e30 so I have enough to switch back and forth but that's a-lot of money to waste. You cant recover ALL the NPG+ from the system without contaminating some of it.

Whorse whats the latest? Did you do a full flush and replace with BMW blue?

I still have Evans NPG+ running in my m62tu. Still have the fan clutch "engaging" due to the higher under hood temps. OIL temp is still higher than normal coolant so i just run M1 15/50. I didn't like how BMW 5-30 and M1 0/40 oil would come out like water when i hit 3k miles.

I rather take it easy and keep the revs under 2k when i hear the flan clutch engage and use thicker oil to withstand the higher temps, Than exploding cooling system every time i get throttle happy.
Pros and Cons i guess.
Evans now sells a New and improved NPG+"C" to address problems users have been experiencing. Too bad i have 3 extra sealed jugs of NPG+ on the shelf. Ill have to sell those before i try the improved npg.

And my findings on the oil temp being higher have been confirmed.

http://forum.roadfly.com/threads/131...ns-NPG-coolant

Ive put 10k on the car since the switch. And no more hiss when opening the cap. I think all the residual water steamed out.