Here are some recommended oil for your snowmobile:
* Yamalube 2-S Synthetic Snowmobile Oil - This is the oil recommended by Yamaha for their snowmobiles and is specifically formulated for use in 2-stroke engines.
* Amsoil Interceptor Snowmobile Oil - This oil is a popular choice among snowmobilers and is known for its excellent performance and protection.
* Motul 800 2T Snowmobile Oil - This oil is another good option for snowmobiles and is known for its high quality and performance.
Be sure to check your owner's manual for the specific oil type and viscosity recommended for your 1993 Yamaha Phazer.