It's finally time to do perform an oil change on the KX100. I'm not sure what brand to use. I know that it has to have a viscosity of 10W-40. Any suggestions of what to use? I hear Lucas oil is good but what do you guys recommend?
Mobil Delvac 15 / 40 Diesel oil . Works in everything , price is right , WalMart , about $ 10 - 12 . Gal. .....

I use it in everything from mowers to bikes , to most vehicles .... Not family car , uses 5 w 30 ..