After finishing up all the odd oils in the garage (Amsoil, Rotella, Suzuki, Bel-Ray, etc.) I've settled on a case of this for both the LIKE200i and my Piaggio Liberty150i, @ $6/Qt, delivered.
Should last awhile as the Like takes less than a Qt and the Liberty @1.5 Qts. The Liberty goes a long ways between changes, I guess because it has a real spin-on filter. Neither scoot requires much $$ to run each year* - so I like to do the oil changes on the LIKE at least every 800 miles - the Liberty at @ 1500 >2000.
I think the most expensive oil I've used was the scooter specific Amsoil at $15 Qt. (off the dealer shelf) Cheapest was the Rotella at @$22 for 5 Qts.
This oil specifically mentions that it is good for
4-stroke aircooled engines....and meets all the specs in my Piaggio manual.
Stig
*most years all the scooters get is gas and oil. I'm not wealthy - but I can afford a Qt of oil....