Originally Posted By: Patman
I got a very quick response to my email, from the president of Wearcheck Canada actually! Here is his response:
We use percentage allowable (PA) based on the allowable levels for oxidation, nitration and sulphation by FT-IR. Essentally oxidation is Abs/cm is abnormal at 0.2, so if your reading was 0.2 that would be 100 PA. Most likely you have some PAO synthetic oil in your car and that is masking the true oxidation value and making the oxidation appear to be much higher because part of the PAO molecule shows up at the same wavelength as oxidation by-products. Hope this answers some questions for you.
If you want the oxidation value in Abs/cm, then simply multiply by 0.2.
For sulphation and nitration multiply the PA by 0.25.
This is very informative. Thanks Patman for emailing and thanks to Wearcheck for the good explanation.
I got a very quick response to my email, from the president of Wearcheck Canada actually! Here is his response:
We use percentage allowable (PA) based on the allowable levels for oxidation, nitration and sulphation by FT-IR. Essentally oxidation is Abs/cm is abnormal at 0.2, so if your reading was 0.2 that would be 100 PA. Most likely you have some PAO synthetic oil in your car and that is masking the true oxidation value and making the oxidation appear to be much higher because part of the PAO molecule shows up at the same wavelength as oxidation by-products. Hope this answers some questions for you.
If you want the oxidation value in Abs/cm, then simply multiply by 0.2.
For sulphation and nitration multiply the PA by 0.25.
This is very informative. Thanks Patman for emailing and thanks to Wearcheck for the good explanation.
