Observation – Does Amsoil engine flush actually work? How well can a detergent-based engine flush formula with advanced light base oil technology perform? Hypothesis – After extensive research, I learned that using a detergent-based engine flush is the safest option available. Many engine flush products on the market are solvent-based or are not listed by … Continue reading AMSOIL Engine Flush Before and After Test Pictures – Great Results on my 2015 Volvo V60 Polestar