14ml was just an approximate at the time, though it was measured with a graduated syringe also, but maybe not with an eye to true precision. So I'll have to say it was 14ml +/- with an tolerance factor of may 2ml .... YMMV.
I'll do a carefully measured fill-up this afternoon when I get back from my shoot. As this is a double shoot weekend I'm a bit busy just now, and will be leaving in a few minutes.
Heck, after I do a carefully measured fill, I might as well do another timed run too, and see if the two battery ignition has any effect on that.