Lube is a very personal choice - everyone has different ideas as to what makes a good lube.
The LH range of flavoured lubes are suprisingly effective. They have a good consistency, they aren't too runny, and they smell (and taste) fantastic too!
With the strokers/sleeves that we have, I switch between Tenga's own brand lubes (as these do work suprisingly well with their products) or the Lelo Personal Moisturiser (which also has a good consistency and satin feel to it).
But as fluffs said, you're best sticking with water-based lubes. I tend to find silicone lubes a bit 'stickier' anyway, but they could also damage the sleeves, and this will inhibit your enjoyment and usage of them.
But the best thing to do is experiment! Try different lubes and eventually you will find one you are happy with.