The owner's manual doesn't mention how large the washer reservoir is, so I assume it's around 3.78 L assuming you still had some left when the washer fluid warning appears.
I ran the washer fluid level down that it would only squirt on hard right turns. The rear wiper washer hasn't squirted in months and really haven't needed it. I put a full gallon in and part of another (clear style washer fluid)!
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