Yes, KY is water-based and is great for lubricating the lengths of rubber or plastic tubing, Terry. With the thin, very smooth blunt ball-tip tubing I use, I don't ever use any lubrication. The snakes throat mucous always seems to slide in very effortlessly.
I will also mention that depending on which type of soft plastic/rubber tubing is used, it should always have a very blunt tip so it doesn't tend to dig into, or poke the snake internally. I have lengths of feeding tube that already have a rounded tip when longer lengths are needed. The conical cone-shaped ends can be cut to accomodate any syringe too. As Joe already mentioned, this type of tubing works best if it is spun slightly back and forth when gently pulled back out of the snakes throat to prevent snagging on the snakes recurved teeth.
~Doug

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"a snake in the grass is a GOOD thing" 

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