This particular two stroke would need oil changes. Some of the traditional ones did not because the oil was mixed with fuel to lubricate the seals that exist b

This particular two stroke would need oil changes. Some of the traditional ones did not because the oil was mixed with fuel to lubricate the seals that exist between the piston (part that moves up and down) and the cylinder (which houses the piston). In most engines that we refer to in cars, the lubrication happens from the bottom in the crankcase (where you see the rod beneath the piston).