Many people do. But all one needs is to push the engine too hard to where it overheats. The oil breaks down since it has dissipated all the heat it can handle. Cylinders then heat up causing the head to also heat sine it cannot dissipate any more heat as well. Piston gets too hot causing it to warp due to excessive heat. Rings now are mashed between the ring lands and will no longer expand and contract causing the engine to rapidly burn and blow out most of the oil until something seizes and causes the engine to stop. Now don't get me wrong, the same thing can be done with the proper oil since these engines heat up more and cool down slower in a buggy as compared to the scooter they were designed for. But with the oil used in water cooled engines you will reach that threshold 100 + degrees sooner, and run in the danger zone longer.
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