My FR-S was manufactured on 12/12 and I don't think the battery water has been checked (if it was) since then.
For the old fucks like me here checking and adding water to a car battery is nothing new but this maybe helpful to some forum members.
If you still have the original battery it has Lower and Upper level markings on the front of it. You should fill the cells with distilled water to just below or to the bottom of the cell tubes. The bottom of the cell tubes is about at the Upper level marking. Wear rubber gloves and safety glasses.
http://www.interstatebatteries.com/m...tain-a-battery
Screw off caps.
Water levels were low, just above the lead plates.
Upper and Lower level indicators
Added water to just below the cell tube bottoms
Use a small paper cup or syringe to add water to the cells
