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S-4SR is a 100% synthetic formula design for high stressed 4-cycle racing engines in the most severe conditions. S-4SR is an MPZ® Fortified formula that offers the ultimate in viscosity control, anti-friction, anti-wear, and improved power output. It is formulated to reduce engine temperature from high load conditions. A selective additive system and polymer chemistry also provides anti-oxidation, anti-foam and anti-rust features to keep engines protected.
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