Pro Star Super Premium Synthetic Blend 4 Stroke – 950ml

Exceeds OEM requirements – will not void engine warranty Surpasses API requirements for SJ, CF-4 and CH-4 Premium, synthetic blend engine oil designed for 4 stroke high-performance outboards, gasoline inboards and stern drives Additive package optimizes engine cleanliness, prevents sludge build up Shear-stable polymer additives plus synthetic base stocks maintain proper viscosity under extremely harsh marine conditions Synthetic/organic blend assures excellent low-temperature properties for quicker starts Provides maximum protection in severe, high rpm applications Marine engines typically operate at higher rpms than automotive engines, requiring an oil that is specifically designed and formulated to provide protection under these higher temperature, higher stress circumstances Marine engines have vertical crankshaft s versus horizontal crankshaft s in automotive engines. As a result, while an automotive engine’s crankshaft is continuously bathed in oil,the marine engine’s crankshaft is not, so it needs an entirely different oil formula for maximum protection Marine engines are oft en operated in harsh, saltwater environments that are much more demanding than the conditions faced by most automotive engines. Accordingly, their engine oil must be up to the task