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Semi-Syn is a semi-synthetic 10W-40, ester-based automotive engine oil designed to ensure optimum protection and peak performance for race and hot rod engines. Surface-active ester synthetics provide exceptional oxidative and thermal stability while preserving film thickness and wear resistance across all operating temperatures. World-class, proprietary additive system facilitates maximum power, efficiency and cleanliness for unrivaled engine performance and durability.
- World-class, proprietary additive system and esters combine to virtually eliminate oxidation and wear
- Surface-active chemistry aggressively attaches to engine surfaces and keeps them clean
- 2X Zinc System provides maximum protection for flat tappet cams and roller cams
- Shear-stable, ester-based formula maintains oil viscosity and film thickness
- Superior protection at any temperature