We have a Peugeot Vivacity 50s scooter in the original condition (nothing tuned) and have received a good offer for Castrol RS Power1 2Tact oil. So far we had taken from Liqui Moly the simple, semi-synthetic. Peugeot is recommended for the scooter also partly synthetic. Is it better or even worse to take full synthetic? I have read that fully synthetic only burns cleaner at high speeds and at low rather uncleaner than partly synthetic? Wouldn’t I with the fully synthetic with a stink normal scooter in the original condition not rather the exhaust and carburetor stick to me ??? The scooter is not throttled i.e. drives according to tacho according to load 50-60 km/h and the box is certainly not driven like Sunday drivers i.e. as far as possible also at maximum speed – however mostly in urban traffic and mostly only distances of no more than 3-4 km ! For all answers in advance many thanks !