I just bought a People 150, but won't get to ride it until Feb. My take on air cooled scooters is, after doing a very early oil change during the break in, and then again at the suggested first service interval (usually 300-500 miles on most motorcycles and scooters), I then settle down to oil changes every 1000 miles. A scooter, though, shouldn't be as hard on oil as most motorcycles, as they use the same oil as lube in the clutch and transmissions (except Harley-Davidsons, Royal Enfields, and other older motorcycles). But many scooters, especially like the little Ruckus's and Metros (like we have owned)spend most of their time running with the throttle pegged to the stop.These little scooters usually hold less than a quart.So I changed at 1000 miles as cheap insurance.
My new 150 may not be running full out all the time, but still will be turning pretty high revs.And the average temperature will be in the eighties all year round. But I'll see how dirty the oil looks at this interval.
jon