Wow, indeed. I have an AGT with 19" wheels. Up to about 4K miles, I got 3.4 over the drive from Palo Alto to LA. Recently, however, I got 3.6 - 3.7 as I approach 10K miles. Same driving. The difference could be related to temperature. Then I drove when the temp was in the mid-'50s., now is the mid 70'sOh, wow. Your car is still young, as all ours are. What has warranted the new battery?