As an authorized Cat® equipment dealer, Foley, Inc. offers Cat® S•O•S (Scheduled Oil Sampling) Fluid Analysis Services to NJ, PA and DE customers. SOS fluid analysis is a routine sampling program developed by Caterpillar® that enables you to identify trends that can help detect changes in the health of your machine fluids over time. We can provide testing for oil, coolant and diesel fuel at our state-of-the-art location.