I had this issue almost a year ago after I got the VCG and OPG done and it never happened again until Friday. Basically, the car sat for 3-4 days because I was driving a loaner that was given to me after dropping off my mom's car at the dealership for repairs (she works from home). I started the car Friday morning (probably around 50 degrees in the garage) because I was going to my Indy to get the brake fluid flushed and it took a while for the car to turn over. Not like minutes but a few extra seconds for the starter to engage, if that makes any sense. That same day, I start the car after they change the brake fluid and it starts up fine. Today, I start it up in the morning to go to work and it took a few extra seconds for the starter to engage. Once I got off work, I go to start the car and the same issue happened. I press the start button and it took a few extra seconds for the car to start. I doubt the battery is going bad because I just had it checked out and it came out fine. As stated above, I had this same issue almost a year ago and ever since then, it hasn't happened until Friday Morning.