Thankyou for the reply.
In your last paragraph you state that Type I fluid can be used in 100 percent concentration. However from what I have read I can see no benefit in using TYPE I undiluted if as you correctly point out the optimum mix ratio is around the 70:30 figure. I have read some of those tables you mention today regarding concentrates and performance.
I accept what your saying is technically feasable but if the optimum mix provides the best LOUT and by extension the optimum quantity of Glycol for the OAT or skin temperature why would you want to make the fluid under-perform?
From a economic and environmental view is using maximum concentrate also more expensive and harmful than a diluted mix?