I've used Scotoilers for years after the experierence of a Yamaha FZR1000 running the Cabo 1000
(illegal roadrace the length of Baja from San Ysidro, CA to Cabo San Lucas, Baja California Sur) without any chain adjustment needed- and without oil slung all over the back of the bike or rear rim. The bike ran over 170mph in places...
...a lot of places, for over 1,000 miles
And neither could I. Back it up with some numbers... here's a quantitative analysis of using WD40 alone on motorcycle drive chains (I've posted this a time or ten) done by Bob who is a Mechanical Engineer, inventor of the "Thermo Bob"
Griz, if you think your Teflon spray isn't penetrating the "sealed" O/X/W-rings to get inside the chain rollers you're mistaken it does- Teflon is one of the slippery-est substances we've invented
Anybody who doesn't like or want their Scotoiler, feel free to send it my way. They work great- and for those who complain about the mess, learn to adjust it. It ain't rocket science, just twist the top. Turn it up to wash the chain then back down once you're out of the dirt/mud.
Capt.saveaho, I'd highly recommend your dad get one- go for the "Touring Model" as it has higher capacity & mounts easily. Hanging one in the exhaust of hot air from the radiator isn't a good idea as it will change the viscosity of the oil you use