 At Hot Shot Secret, we share the science behind common diesel problems. For example, Stiction. Engine oil can break down under extreme heat, leaving behind varnish, a carbon-based deposit that creates drag on the engine's moving parts. This sticky friction is Stiction. Symptoms include a rough idle and the loss of fuel economy and performance. Hot Shot Secret Stiction Eliminator is formulated to be left in the engine. It works as you drive. Stiction Eliminator is available at truck stops, tractor supply, O'Reilly's Auto Parts, and online at hotshotsecret.com.