Not unless you have that magic combination of a really slow and controllable pump, like GPM spoke of, and the deft touch of a surgeon. Where I'm at, I think all the gas pumps are adjusted for alternate duty with the fire department and I combine that with the touch of a blacksmith. I haven't tried to fill at temps over about 80 F so I don't know if expansion due to temperature would be a problem. So far, no spilling, drooling, or other embarassing loss of fluid with my R3T.