Is there any correlation between low CHTs and lead buildup on the rings? I came to the RV community after flying a Cirrus SR22 for 6 years. In LOP cruise our CHTs usually ran 285-300 degrees. We had a recurring problem with lead deposits building up on the rings which kept the rings from rotating freely thereby increasing oil consumption. The solvent ring wash procedure never worked, so we re-worked four cylinders in a three year span. It seemed like the cooler running cylinders had the bigger problem with deposits, hence my question. Any thoughts?