I have had a yellow top in my car for over 2 years now and it is still cranking strong. I had an Interstate battery in the car for 7 years and I didnt even pay attention and one day the alarm didnt even have enough power to make a beep...lol
I purchased the yellow top b/c at first I wanted the red top because the red top has more cold cranking amps and the yellow top has more stand alone time (almost double the red top I believe, so you can run stuff and not run the battery dead and not immediately load up your alternator). I ended up with a yellow top because we bought the red top walked outside O'Reillys to install it and the terminals were chewed up like someone took a post cleaner to them, meaning it was briefly used by someone and then put back on the shelf.
So I ended up with a yellow top and it works great!! I have two yellow tops residing i the excursion to start that big ass diesel. Also have a Red Top in the Cobra for over 2 1/2 years now and it only has 2500 miles on it so far, which means it sits more than it gets used.