go to Walmart, always in stock, get OEM replacement size so U dont have to screw with drilling, welding, adapters ad nauseum...

Very interesting. Doesn't seem to hold up for very long so probably not an good option for a DD (especially a modern car that keeps the ECM powered up). Might be a great solution for a track car.

I run a yellow top Optima in my 240Z. It is bulletproof.

All interesting comments about the battery on this thread, since mine is now at advance auto to get re-charged, any one using an auto-tender?

My Z is my DD, so the alternator gets the honors.

Kirk B.

I use a Battery Tender for winter storage and a few times in the summer.

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Battery tender for years on motorcycle, and on cars as needed. Only when we get real snow do the cars sit for > 2 weeks without being driven and I toss them on the tender.

This winter the 2010 OEM battery was starting to show its age after a few days of sitting not turning the car over quite as well, so I replaced with an Interstate, which was not that hard to get just an order from local Midas and it was here a few days later. Sure not walmart but IMHO a better battery.

- b

Yellow top over Redtop?
 

Why? Optimum shows the Redtop as the 1st choice for today's automobiles. Yellow top for cars with heavy electrical loads. Although, there is only a minor price difference.