[Shuie]

What about piping into the drain plug hole and finding somewhere else to drain the oil from during an oil change? Maybe use a flex line to connect the cooler line to the bottom of the tank and then just unhook that line from the cooler line whenever you do an oil change. Or maybe find an inline valve to open and use as a drain between the tank and the cooler. I've never tried it with oil, but I know you can use gravity to siphon gas out of a tank from the filler pretty easily as long as you get the drain end of the line lower than the tank. You could also pump it out from the filler. Nothing suggested above would be real elegant, but youre in a weird situation here.