I would like to change the oil in this motor but need to know how much to buy. I read an article which stated not to drive on the oil it is shipped with and I don't know if the person who had it before me for three months who bought it new, ever changed it or not. I was told to get 15x40 JASO MA CERTIFIED MADE FOR FOUR STROKE MOTORCYCLES. Then another person said 15x40 sf,fe,etc. which would be best since this is clutch driven and how much should I buy? sorry for all the questions but I'm new to ATVs and the Chinese seem to be hard to find info for.  Thanks!      

When I bought my 250 tao tao 4 wheeler, the dealer said after 1 hour ride time to change the oil. I asked what type 10w40 is fine." He is the main distributor out in Olathe Kansas for the kc / lawrence area.  

Oh its not quite 1 quart according to the owners pamplet or when i measured it out and changed it. I bought walmart 10w30 or 40. Ive had no problems.