Hi i would like to know your opinion about the oil i use. I read that briggs dont recommand to use car oil. I bought a brigg 206 to my son and at the kart shop they use lucas syntech 10w60. Im from montreal canada so we dont have briggs 4t oil. Amsoil and redline are pretty hard to find. If i can find better oil type those i have something special to do between the switch of oil due that some oil cant be compatible?