No. Cerma STM-3 Engine Treatments do not affect warranties because they do not affect the pH, nor do they blend with any lubrication fluid into which it is introduced. Cerma STM-3 Engine Treatments do NOT treat the oil or the fluid into which it is introduced. Cerma STM-3 Engine Treatments treat the metal only by using the lubricant as a carrier. In addition, Cerma STM-3 Engine Treatments do not affect, in a positive or negative way, any type of seal material.
Both Cerma STM-3 Engine Treatments and Cerma Motor Oils, when introduced to the lubrication stream, will start to work within minutes, Reducing harmonic vibrations, then reducing heat. Although you will see & feel immediate results, both treatments and oils will take up to 3 months before they have completed their process. In some cases the treatments and motor oils will provide fuel savings within an engine, This process can take 5 minutes or up to 90 days to become fully cured, depending on the amount of lacquers your engine has built up over the years of use. (Cerma products do not use solvents, they rely on particle size to penetrate the lacquer build up, releasing the carbon and laquar buildup into the oil stream to be filtered out).