Last Fall I changed the oil on my '11 Mustang (V6), drove it about 500 miles and put it down for the winter. The OLM was right around 93%. I brought it up 2 weeks ago and the OLM was at 34%. It wasn't started during the storage period, just had a trickle charger on the battery. I'll reset the OLM and change the oil again this fall since I'll only put a few thousand miles on the car and I'm running full synthetic oil (Castrol 5w20 is in it now). I found it interesting that the OLM dropped 60% without it being run.