hi, i just purchased a 1993 rmx 250 (suzuki) and i did some research cause i couldnt find where to put oil or if it was premix. so i did and then a forum said its premix then another forum said something about crank case oil and then yet another said you got to have gear oil. so what kind of oils do i need? 1. is it premix or oil injected 2. crank case oil...whats this and where do i drain it/ pour new oil in (ive never heard of crank case oil before) 3.gear oil, again where do i put it in (if there is gear oil, im so confused) i drained some type of oil from it but the crank case still had oil in it...alot of oil. the bolt was towards the back of the bike where i drained the oil, is this gear oil or what. im really REALLY confused and i dont want to ride it until i have all the oil and everything figured out. thanks in advanced!! maybe im just read something about a 4 stroke...but they clearly said rmx250.