considering the price of the smaller bottles in kits or individually, this cost is similar but you get a whole litre.it does what its supposed to and has the recommendation of at least Evans if not others.it job specific too,not a hack or useful but untested replacement.so if you have a bike and you want to save money this is the oil for you.i've also got the wt15 and wt5.its so cheap and i'v0e got several bikes.