This is the quality and grade of Engine Oil Robot from Scooterwest recommends for your Piaggio BV 350. 

New synthetic lubricant, specific for the use in modern scooter and motorcycle 4 stroke engines with high performance. It offers an excellent thermal stability and stay-in-grade within a vast range of temperatures, with higher anti-rust and anti-wear features. Compatible with catalytic exhaust systems prolonging the life of the catalytic exhaust, higher gas mileage, and a reduction in emissions. A Multi-Grade oil that allows optimum engine performance and easier starts in every season.

Also Available in 5W-40 7612444B