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Premium Engine Efficiency Oil Additive with Borated Polyisobutylene. Excellent Detergency: Inhibits carbon and varnish formation on engine pistons effectively. Anti-Wear Properties: Offers antioxidant and anti-wear protection for engine components. Seal Compatibility: Improves compatibility between oil and fluororubber seals. Customizable Viscosity: Kinematic viscosity at 100C can be customized within 130-250 mm2/s. Customizable TBN: Total Base Number can be customized within 15-30 Mg KOH/G. 100% Pre-Delivery Testing: All goods undergo 100% testing before delivery to ensure quality.