Mobil Super 2000 has a API SL rating, that's the last classification BEFORE zinc reduction... Should be fine...
I want full synthetic, a little bit more of money to keep my engine running longer as possible. Not easy to find full synthetic, but I found the Motul 300 V 10W40. https://www.motul.com/fr/en/products/300v-chrono-10w40--2
Under normal operating conditions there is little difference in engine longevity using synthetic vs dino... Mostly difference are performance in temp extremes and amount of time/miles(sorry I don't drive Km) the synthetic can be used before it needs changing... I have synthetic in the everyday drivers, the toys have good old dino...
I finally add Motul 300V Chrono 10W40, more easy to find. Difficult to find information about zinc in this oil, on a french forum they speak about 800 ppm. At idle I can hear cam clac clac, very light. Carb is rebuilt, I found the TDC (no pointer available), ignition is setup to 6°, that Maverick runs much much better than the first days here, and the idle is perfect straight. Time to enjoy.