Well, I can try. This is a bit of a gray area, really.
Official company policy is that we advise to stick to water-based lubes. It's just next to impossible to test and retest every brand of lube, and if a lube company changes formulation, we have no way of knowing - so we err on the side of caution and recommend only water-based lubes.
That said, there are many silicone lube devotees out there. Anecdotal evidence seems to indicate that if both toy and lube are high-quality, there should be no damage to the toy. I can absolutely vouch for the quality of the silicone Tantus uses for toy manufacturing - but I'm not in the lube factories every day, so I have no idea what they're using. (Not to mention there are a great many toys on the market that are labeled "silicone" that are not actually silicone.) You see my dilemma....
Using silicone lubes can be risky for your silicone toys and I hate to think of someone needlessly damaging a cherished item. While I can warranty any Tantus item that has a material defect, we can't replace items damaged due to the use of silicone lubricants. If you feel like testing your favorite brand of lube, you could always do a tiny patch test on the base of the dildo - even a small drop of lube will immediately get sticky/gummy if bonding occurs. (I.e. if it gets so gummy that you have to clean it by scraping with a fingernail....) Should that happen, do NOT use anything but waterbased lube.
In my experience, the softer (like the O2 outer layer) silicones are the most prone to damage so it's worthwhile to proceed carefully.
Does this help? I know that that's sort a a no-but-yes-but-no answer. I feel like Vicky Pollard from Little Britain right now. I will leave you with this - Tantus staffers get a great many free toys, and most really like silicone lubes. Reportedly, almost every one of us, as a matter of habit, does a quick patch test when opening a fresh bottle. Just a good practice, if you ask me. Good luck!