I said KOH equivalent that is how the TBN result is calculated. I did not say there is KOH (potasium hydroxide) in the oil. Potasium level should be very low in the oil that is how the presense of antifreeze in oil is detected. Also I hope Redline is wrong about CaCO3 otherwise your oil will fizz like soda-pop and who is Redline anyway? I will be sure to stay away from their products.