my son gave me his like new optima battery . he had it in his 2002 gt. I have a highly modified 95 mustang gts. I ran so much better that I couldn't believe it. I told him that. He now has a cts-v. this last week the battery died on so he went to buy another one. well he got another optima. The he called me to say that all he did was replace the battery the car runs better that it ever did with the conventional one in it. all i said was I told you so... Has anyone else noticed this? besides us? I'm just curios.