To me, 92 doesn’t sound that high—that’s less than 1/10 of an amp, or about 1.1 Watts of power. If the car has keyless entry, a stereo, Onstar, an alarm, in addition to the vehicle’s own computers, it’s possible that just maintaining the memory of these devices is using this much power. Of course I don’t know what the draw should be, so I can’t answer your original question. What kind of meter did you use to measure the current draw? The cheapie analog meters (the kind with the needle that swings) have pretty lousy accuracy at measuring low voltages and currents.