FlexBilt offers this motor oil saver additive that is formulated to maintain and regenerate rubber and plastic seals in your engine oil in both gas or diesel engines. Unnecessary oil consumption due to aged and hardened valve stem seals is reduced by using this oil saver additive.  You should see a reduction in blue-ish exhaust smoke, improved emissions, and external leaks should be minimized or eliminated all together.  Also, motor oil saver additives are known to dampens engine noise, reduces repair costs, reduce pollution, and improves the environment.