Motul Scooter Expert 10W-40 4-Stroke Engine Oil Motul Scooter Expert is a Technosynthese? lubricant designed to meet today’s 4-Stroke scooter specifcations where a 10W-40 viscosity grade and the JASO MB specification are required. Approved JASO MB lubricant ensures optimal engine performance and fuel economy on all scooters without wet clutch. Reduces fuel consumption. Provides Low Emission. Detergent and anti-wear properties.