at 15 hours, they shouldn't really need it. As mentioned above, turn them upside down and let the foam rings soak up some oil. When it does come time to service, the (Fox) 7wt is for the sloshing around stuff. I think it's a rebadged Torco fluid but as it's not doing any damping, the weight isn't hugely critical (still slightly significant due to the hydrodymanic bearing design).
The (Fox) 10wt is rebadged Silkolene Pro RSF is memory serves. The best way to check this is to have a look at thr wiki pages by Peter Van Deron or something similar. He has a lovely long list of oil by viscosity. Match up the numbers and you know what the likes of Fox are using. By the way, the 10wt is for the cartridge damper (depending on year). There's actually quite a good guide to fettling this on the Fox site but I don't do mine any more than once a year.
All I've ever done with any of my three Fox forks is sit them upside down for a while before riding, keep the stanchions clean and change the oil once a year and they're all fine 3 years down the line; and yes, the bikes do get ridden properly and the Peaks has a reputation for being hard on kit. One pair have had the seals swapped to Enduro seals and they've been great.