Oil and Petrol

Hi Guys
I'm just about to pick up a series 3 Li 150 in standard trim after a break from scootering of almost 50 years!
As things have moved on in terms of fuel and oil since my teens, I would welcome any advice on the best petrol and 2 stroke oil to use. I am more interested in keeping the bike running rather than speed and performance.
Any advice would be greatly appreciated.
Thanks
I'm just about to pick up a series 3 Li 150 in standard trim after a break from scootering of almost 50 years!
As things have moved on in terms of fuel and oil since my teens, I would welcome any advice on the best petrol and 2 stroke oil to use. I am more interested in keeping the bike running rather than speed and performance.
Any advice would be greatly appreciated.
Thanks