no, that is wrong in my opinion? I would go with 10/40 most of the time. but middle of the summer 15/50 would have been grand! stick with 10/40 most of the year.....or 10/50.
oh! and welcome to UHE!!! hope you find all that you need here. I have a FE501e but on the road for sale. all of a sudden a few are for sale.
regards
Taffy