https://gearhonest.com/best-2-stroke-dirt-bike-oil/
This completely depends on the rider’s preference. Two-stroke engines are typically noisier and produce more exhaust fumes, but also produce more power compared to their weight than four-stroke engines, making them popular for racing. Four-stroke engines, whilst heavier and producing less power per weight unit, are typically described to run smoother, emit less exhaust fumes and generally last longer.