The GM spec for a drain is 50 mA. The normal reading I get on a good system is 15-30 mA. It takes about a 300 mA drain to run down a battery enough overnight for it to not start. If you have a 144 mA drain it will take 2 or 3 days for the battery to run down enough for it to not start. You said the battery is new, was it doing this same thing before you replaced the battery? You could still have a bad battery. I have also seen relays intermittently stick causing a high drain at times.
I assume you know how to use your meter correctly to check amps and the fuses in your meter are good. It sounds like you probably have a larger drain than you are detecting.
