The lubricating oil in gas turbines and hydraulic systems is increasingly subject to the ravages of varnish. The debilitating effects of varnish are well documented. The complexities associated with detecting varnish potential render routine oil analysis ineffective in reporting varnish. However, there are a number of technologies, although seldom used, which have been successful in reporting incipient varnish potential. Insight Services has developed a Varnishing Potential Analysis that incorporates these technologies into one simple report to offer an integrated varnish potential solution.