If you want your car to start after it sits for a few days do not put a red top in it. I had one in my G37 coupe and if it sat for more than 3 days over the winter it wouldn't start. The battery was less than a year old so I had it replaced under warranty and paid the difference for a yellow top. I had no more problems, and left my car sit for a week just to see if it would start.(it did) We use the yellow top in our Police Fleet to replace the OEM batteries, because of the high demand put on the electrical system by the light bars, spotlights, electronics etc. The Yellow tops outlast any other battery(including red tops) by about a 3to1 margin. Odyssey makes an outstanding AGM battery but I have never personally tried one in a car. (I have one in my BMW motorcycle,and it's a bad sumabitch)
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 The Z is hers. I'm just the caretaker.
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