I did a quick skim thru the manual and didn't see anything right off. The manual shows the engine oil fill cap to the right of the dip stick. There is also a yellow oil fill cap on top of the valve cover like on a car, but I don't see that one in the book. Is the top one so you don't have to pull the side cover off? Are you supposed to even use the top one for anything? Am I having a "duh" moment here?