I buy my oil at canadian tire or walmart when it is on sale,. mobil 100 % synthetic 5 w 50 and do not use synthetic oil befor your scooter is broken in ,. I switched to syn. oil at 600 miles for the motor ,. the tranny can use syn. oil from the git go,. and I allways change the oil hot, be for any crap in the oil has a chance to settle,.