Almost every paintball lube on the market is just some other off the shelf stuff tossed ina fancy bottle.
Get synthetic ATF (isnt it all these days?), ATF is made for sensitive parts and valve body seals, which are much like what we have in paintball guns (only a tad tougher)
Ive been usiung ATF in my guns with no problem, even in winter.
Mobil 1 Synthetic ATF
Now anything with "High mileage" or some other additive will usually have a detergent or additive that will cause seals to swell (and preventing leaks in a car).