Hello Blaster Forum and members, I'm new here to your forum and would like to Thank you for allowing to join, In not new to the quads, dirt bikes or motorcycles , but, I'm not real familiar with the Yamaha Blasters, I just recently picked up a cheap Blaster from my neighbor and in need of your help, from what I have found it's a 1991 and I need to know what you all recommend for the crank case oil ??? ( Engine / Transmission ) I have no owners manual and would like to drain the old oil that's in it now before the quad goes anywhere. Thank you. I have already drained and cleaned the tank, cleaned carb which was in diers need of a good cleaning, new hoses, etc.