I bought a Vespa ET2 a few years back, its a 2004 if I remember right, but Ive been away from it more than Ive been with it. I need to add some more oil, but I can’t remember which type anymore (the manual is missing). Im just about positive it’s a 2 stroke engine, and the oil is seperate from the gas, but it mixes itself.

Is there a special type of 2 stroke engine oil I need to purchase, or will anything do?