This method is for the determination of the pH value of used or inservice engine oils. The method covers a measured pH value of 2.0 to 8.0 for engine oils.
The standard is requested by OEM engine manufacturer's who base their oil change intervals on pH values. The measured value provides valueable information on the acidity of test samples and is used as one criteria for when to change the lubricant.
Keywordsengine oils, pH Initial pH, i-pH, gas engines
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top