Time for a new battery 355?

Many threads on this. Bottom line, you need a size: Group 34R.

Two most popular are the conventional type: Interstate 700 CCA

Or the Optima (either red top or yellow top (deep cycle where the car is not used much)) Rated at 800 CCA The Optima is better at sitting for longer periods of disuse. The yellow tip is designed to handle deep discharges without damage.

Dave

 

I use Optima, always have, fit and forget.

 

Optima as well - I have also used interstate wth no problems..

 

Would 34R be the size for a 98 355 as well?

 

Yes, all 355's.

 

Thanks.